Finding the Fourth Proportional to 115,156.32, 158,915.34 and 64,171.23

Step by Step Solution

1. Step 1: Write the proportion equation
   115,156.32 : 158,915.34 = 64,171.23 : x
2. Step 2: Convert to fraction form
   115,156.32/158,915.34 = 64,171.23/x
3. Step 3: Cross multiply
   115,156.32x = 158,915.34 × 64,171.23
4. Step 4: Simplify right side
   115,156.32x = 10,197,792,833.67
5. Step 5: Solve for x
   x = 10,197,792,833.67/115,156.32
6. Step 6: Final answer
   x = 88,556.08