Finding the Fourth Proportional to 9,129.40, 12,598.54 and 5,150.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.40 : 12,598.54 = 5,150.50 : x
2. Step 2: Convert to fraction form
   9,129.40/12,598.54 = 5,150.50/x
3. Step 3: Cross multiply
   9,129.40x = 12,598.54 × 5,150.50
4. Step 4: Simplify right side
   9,129.40x = 64,888,780.27
5. Step 5: Solve for x
   x = 64,888,780.27/9,129.40
6. Step 6: Final answer
   x = 7,107.67