Finding the Fourth Proportional to 113,385.56, 156,478.53 and 64,995.55

Step by Step Solution

1. Step 1: Write the proportion equation
   113,385.56 : 156,478.53 = 64,995.55 : x
2. Step 2: Convert to fraction form
   113,385.56/156,478.53 = 64,995.55/x
3. Step 3: Cross multiply
   113,385.56x = 156,478.53 × 64,995.55
4. Step 4: Simplify right side
   113,385.56x = 10,170,407,973.08
5. Step 5: Solve for x
   x = 10,170,407,973.08/113,385.56
6. Step 6: Final answer
   x = 89,697.56