Finding the Fourth Proportional to 142,492.18, 196,644.99 and 78,828.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,492.18 : 196,644.99 = 78,828.88 : x
2. Step 2: Convert to fraction form
   142,492.18/196,644.99 = 78,828.88/x
3. Step 3: Cross multiply
   142,492.18x = 196,644.99 × 78,828.88
4. Step 4: Simplify right side
   142,492.18x = 15,501,304,123.31
5. Step 5: Solve for x
   x = 15,501,304,123.31/142,492.18
6. Step 6: Final answer
   x = 108,787.05