Finding the Fourth Proportional to 9,129.47, 12,598.76 and 5,354.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.47 : 12,598.76 = 5,354.87 : x
2. Step 2: Convert to fraction form
   9,129.47/12,598.76 = 5,354.87/x
3. Step 3: Cross multiply
   9,129.47x = 12,598.76 × 5,354.87
4. Step 4: Simplify right side
   9,129.47x = 67,464,721.96
5. Step 5: Solve for x
   x = 67,464,721.96/9,129.47
6. Step 6: Final answer
   x = 7,389.77