Finding the Fourth Proportional to 142,655.49, 196,862.17 and 78,991.92

Step by Step Solution

1. Step 1: Write the proportion equation
   142,655.49 : 196,862.17 = 78,991.92 : x
2. Step 2: Convert to fraction form
   142,655.49/196,862.17 = 78,991.92/x
3. Step 3: Cross multiply
   142,655.49x = 196,862.17 × 78,991.92
4. Step 4: Simplify right side
   142,655.49x = 15,550,520,783.67
5. Step 5: Solve for x
   x = 15,550,520,783.67/142,655.49
6. Step 6: Final answer
   x = 109,007.52