Finding the Fourth Proportional to 9,411.18, 12,988.74 and 5,432.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.18 : 12,988.74 = 5,432.22 : x
2. Step 2: Convert to fraction form
   9,411.18/12,988.74 = 5,432.22/x
3. Step 3: Cross multiply
   9,411.18x = 12,988.74 × 5,432.22
4. Step 4: Simplify right side
   9,411.18x = 70,557,693.20
5. Step 5: Solve for x
   x = 70,557,693.20/9,411.18
6. Step 6: Final answer
   x = 7,497.22