Finding the Fourth Proportional to 9,002.12, 12,421.76 and 5,022.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,002.12 : 12,421.76 = 5,022.63 : x
2. Step 2: Convert to fraction form
   9,002.12/12,421.76 = 5,022.63/x
3. Step 3: Cross multiply
   9,002.12x = 12,421.76 × 5,022.63
4. Step 4: Simplify right side
   9,002.12x = 62,389,879.32
5. Step 5: Solve for x
   x = 62,389,879.32/9,002.12
6. Step 6: Final answer
   x = 6,930.58