Finding the Fourth Proportional to 142,472.29, 196,612.15 and 78,810.08

Step by Step Solution

1. Step 1: Write the proportion equation
   142,472.29 : 196,612.15 = 78,810.08 : x
2. Step 2: Convert to fraction form
   142,472.29/196,612.15 = 78,810.08/x
3. Step 3: Cross multiply
   142,472.29x = 196,612.15 × 78,810.08
4. Step 4: Simplify right side
   142,472.29x = 15,495,020,146.72
5. Step 5: Solve for x
   x = 15,495,020,146.72/142,472.29
6. Step 6: Final answer
   x = 108,758.14