Finding the Fourth Proportional to 9,124.56, 12,591.90 and 5,145.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,124.56 : 12,591.90 = 5,145.68 : x
2. Step 2: Convert to fraction form
   9,124.56/12,591.90 = 5,145.68/x
3. Step 3: Cross multiply
   9,124.56x = 12,591.90 × 5,145.68
4. Step 4: Simplify right side
   9,124.56x = 64,793,919.47
5. Step 5: Solve for x
   x = 64,793,919.47/9,124.56
6. Step 6: Final answer
   x = 7,101.05