Finding the Fourth Proportional to 142,248.53, 196,306.94 and 78,590.43

Step by Step Solution

1. Step 1: Write the proportion equation
   142,248.53 : 196,306.94 = 78,590.43 : x
2. Step 2: Convert to fraction form
   142,248.53/196,306.94 = 78,590.43/x
3. Step 3: Cross multiply
   142,248.53x = 196,306.94 × 78,590.43
4. Step 4: Simplify right side
   142,248.53x = 15,427,846,433.63
5. Step 5: Solve for x
   x = 15,427,846,433.63/142,248.53
6. Step 6: Final answer
   x = 108,456.99