Finding the Fourth Proportional to 9,411.99, 12,990.88 and 5,432.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.99 : 12,990.88 = 5,432.52 : x
2. Step 2: Convert to fraction form
   9,411.99/12,990.88 = 5,432.52/x
3. Step 3: Cross multiply
   9,411.99x = 12,990.88 × 5,432.52
4. Step 4: Simplify right side
   9,411.99x = 70,573,215.42
5. Step 5: Solve for x
   x = 70,573,215.42/9,411.99
6. Step 6: Final answer
   x = 7,498.22