Finding the Fourth Proportional to 3,978,291,499.18, 5,967,437,254.61 and 1,616,899,207.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,291,499.18 : 5,967,437,254.61 = 1,616,899,207.46 : x
2. Step 2: Convert to fraction form
   3,978,291,499.18/5,967,437,254.61 = 1,616,899,207.46/x
3. Step 3: Cross multiply
   3,978,291,499.18x = 5,967,437,254.61 × 1,616,899,207.46
4. Step 4: Simplify right side
   3,978,291,499.18x = 9,648,744,567,510,689,792
5. Step 5: Solve for x
   x = 9,648,744,567,510,689,792/3,978,291,499.18
6. Step 6: Final answer
   x = 2,425,348,813.55