Finding the Fourth Proportional to 115,128.80, 158,885.88 and 64,144.88

Step by Step Solution

1. Step 1: Write the proportion equation
   115,128.80 : 158,885.88 = 64,144.88 : x
2. Step 2: Convert to fraction form
   115,128.80/158,885.88 = 64,144.88/x
3. Step 3: Cross multiply
   115,128.80x = 158,885.88 × 64,144.88
4. Step 4: Simplify right side
   115,128.80x = 10,191,715,706.29
5. Step 5: Solve for x
   x = 10,191,715,706.29/115,128.80
6. Step 6: Final answer
   x = 88,524.47