Finding the Fourth Proportional to 871,105,741.56, 1,201,868,036.28 and 518,398,978.68

Step by Step Solution

1. Step 1: Write the proportion equation
   871,105,741.56 : 1,201,868,036.28 = 518,398,978.68 : x
2. Step 2: Convert to fraction form
   871,105,741.56/1,201,868,036.28 = 518,398,978.68/x
3. Step 3: Cross multiply
   871,105,741.56x = 1,201,868,036.28 × 518,398,978.68
4. Step 4: Simplify right side
   871,105,741.56x = 623,047,162,515,689,216
5. Step 5: Solve for x
   x = 623,047,162,515,689,216/871,105,741.56
6. Step 6: Final answer
   x = 715,237,120.81