Finding the Fourth Proportional to 100,956.72, 139,313.61 and 60,646.62

Step by Step Solution

1. Step 1: Write the proportion equation
   100,956.72 : 139,313.61 = 60,646.62 : x
2. Step 2: Convert to fraction form
   100,956.72/139,313.61 = 60,646.62/x
3. Step 3: Cross multiply
   100,956.72x = 139,313.61 × 60,646.62
4. Step 4: Simplify right side
   100,956.72x = 8,448,899,566.50
5. Step 5: Solve for x
   x = 8,448,899,566.50/100,956.72
6. Step 6: Final answer
   x = 83,688.33