Finding the Fourth Proportional to 12,861,971.22, 19,278,280.17 and 5,180,699.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861,971.22 : 19,278,280.17 = 5,180,699.46 : x
2. Step 2: Convert to fraction form
   12,861,971.22/19,278,280.17 = 5,180,699.46/x
3. Step 3: Cross multiply
   12,861,971.22x = 19,278,280.17 × 5,180,699.46
4. Step 4: Simplify right side
   12,861,971.22x = 99,874,975,666,447.72
5. Step 5: Solve for x
   x = 99,874,975,666,447.72/12,861,971.22
6. Step 6: Final answer
   x = 7,765,137.55