Finding the Fourth Proportional to 9,129.78, 12,598.52 and 5,151.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.78 : 12,598.52 = 5,151.24 : x
2. Step 2: Convert to fraction form
   9,129.78/12,598.52 = 5,151.24/x
3. Step 3: Cross multiply
   9,129.78x = 12,598.52 × 5,151.24
4. Step 4: Simplify right side
   9,129.78x = 64,897,974.41
5. Step 5: Solve for x
   x = 64,897,974.41/9,129.78
6. Step 6: Final answer
   x = 7,108.38