Finding the Fourth Proportional to 99,909.12, 149,819.52 and 53,150.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,909.12 : 149,819.52 = 53,150.88 : x
2. Step 2: Convert to fraction form
   99,909.12/149,819.52 = 53,150.88/x
3. Step 3: Cross multiply
   99,909.12x = 149,819.52 × 53,150.88
4. Step 4: Simplify right side
   99,909.12x = 7,963,039,329.18
5. Step 5: Solve for x
   x = 7,963,039,329.18/99,909.12
6. Step 6: Final answer
   x = 79,702.83