Finding the Fourth Proportional to 103,128.32, 142,336.32 and 60,684.80

Step by Step Solution

1. Step 1: Write the proportion equation
   103,128.32 : 142,336.32 = 60,684.80 : x
2. Step 2: Convert to fraction form
   103,128.32/142,336.32 = 60,684.80/x
3. Step 3: Cross multiply
   103,128.32x = 142,336.32 × 60,684.80
4. Step 4: Simplify right side
   103,128.32x = 8,637,651,111.94
5. Step 5: Solve for x
   x = 8,637,651,111.94/103,128.32
6. Step 6: Final answer
   x = 83,756.34