Finding the Fourth Proportional to 100,968.88, 139,312.56 and 60,713.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,968.88 : 139,312.56 = 60,713.50 : x
2. Step 2: Convert to fraction form
   100,968.88/139,312.56 = 60,713.50/x
3. Step 3: Cross multiply
   100,968.88x = 139,312.56 × 60,713.50
4. Step 4: Simplify right side
   100,968.88x = 8,458,153,111.56
5. Step 5: Solve for x
   x = 8,458,153,111.56/100,968.88
6. Step 6: Final answer
   x = 83,769.90