Finding the Fourth Proportional to 115,200.18, 158,957.01 and 64,201.78

Step by Step Solution

1. Step 1: Write the proportion equation
   115,200.18 : 158,957.01 = 64,201.78 : x
2. Step 2: Convert to fraction form
   115,200.18/158,957.01 = 64,201.78/x
3. Step 3: Cross multiply
   115,200.18x = 158,957.01 × 64,201.78
4. Step 4: Simplify right side
   115,200.18x = 10,205,322,985.48
5. Step 5: Solve for x
   x = 10,205,322,985.48/115,200.18
6. Step 6: Final answer
   x = 88,587.73