Finding the Fourth Proportional to 9,007.86, 12,430.23 and 5,422.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,007.86 : 12,430.23 = 5,422.12 : x
2. Step 2: Convert to fraction form
   9,007.86/12,430.23 = 5,422.12/x
3. Step 3: Cross multiply
   9,007.86x = 12,430.23 × 5,422.12
4. Step 4: Simplify right side
   9,007.86x = 67,398,247.82
5. Step 5: Solve for x
   x = 67,398,247.82/9,007.86
6. Step 6: Final answer
   x = 7,482.16