Finding the Fourth Proportional to 142,450.89, 196,569.01 and 78,787.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,450.89 : 196,569.01 = 78,787.32 : x
2. Step 2: Convert to fraction form
   142,450.89/196,569.01 = 78,787.32/x
3. Step 3: Cross multiply
   142,450.89x = 196,569.01 × 78,787.32
4. Step 4: Simplify right side
   142,450.89x = 15,487,144,854.30
5. Step 5: Solve for x
   x = 15,487,144,854.30/142,450.89
6. Step 6: Final answer
   x = 108,719.19