Finding the Fourth Proportional to 115,131.44, 158,860.32 and 64,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   115,131.44 : 158,860.32 = 64,142.88 : x
2. Step 2: Convert to fraction form
   115,131.44/158,860.32 = 64,142.88/x
3. Step 3: Cross multiply
   115,131.44x = 158,860.32 × 64,142.88
4. Step 4: Simplify right side
   115,131.44x = 10,189,758,442.52
5. Step 5: Solve for x
   x = 10,189,758,442.52/115,131.44
6. Step 6: Final answer
   x = 88,505.44