Finding the Fourth Proportional to 16,830.79, 25,248.62 and 5,142.49

Step by Step Solution

1. Step 1: Write the proportion equation
   16,830.79 : 25,248.62 = 5,142.49 : x
2. Step 2: Convert to fraction form
   16,830.79/25,248.62 = 5,142.49/x
3. Step 3: Cross multiply
   16,830.79x = 25,248.62 × 5,142.49
4. Step 4: Simplify right side
   16,830.79x = 129,840,775.86
5. Step 5: Solve for x
   x = 129,840,775.86/16,830.79
6. Step 6: Final answer
   x = 7,714.48