Finding the Fourth Proportional to 99,647,533.45, 149,471,300.18 and 86,016,071.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99,647,533.45 : 149,471,300.18 = 86,016,071.80 : x
2. Step 2: Convert to fraction form
   99,647,533.45/149,471,300.18 = 86,016,071.80/x
3. Step 3: Cross multiply
   99,647,533.45x = 149,471,300.18 × 86,016,071.80
4. Step 4: Simplify right side
   99,647,533.45x = 12,856,934,088,322,234
5. Step 5: Solve for x
   x = 12,856,934,088,322,234/99,647,533.45
6. Step 6: Final answer
   x = 129,024,107.70