Finding the Fourth Proportional to 458,548,389.84, 687,928,843.98 and 131,028,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   458,548,389.84 : 687,928,843.98 = 131,028,168.72 : x
2. Step 2: Convert to fraction form
   458,548,389.84/687,928,843.98 = 131,028,168.72/x
3. Step 3: Cross multiply
   458,548,389.84x = 687,928,843.98 × 131,028,168.72
4. Step 4: Simplify right side
   458,548,389.84x = 90,138,056,636,366,000
5. Step 5: Solve for x
   x = 90,138,056,636,366,000/458,548,389.84
6. Step 6: Final answer
   x = 196,572,616.18