Finding the Fourth Proportional to 113,200.72, 156,213.69 and 64,801.04

Step by Step Solution

1. Step 1: Write the proportion equation
   113,200.72 : 156,213.69 = 64,801.04 : x
2. Step 2: Convert to fraction form
   113,200.72/156,213.69 = 64,801.04/x
3. Step 3: Cross multiply
   113,200.72x = 156,213.69 × 64,801.04
4. Step 4: Simplify right side
   113,200.72x = 10,122,810,591.43
5. Step 5: Solve for x
   x = 10,122,810,591.43/113,200.72
6. Step 6: Final answer
   x = 89,423.55