Finding the Fourth Proportional to 9,339.16, 12,887.92 and 5,090.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,339.16 : 12,887.92 = 5,090.42 : x
2. Step 2: Convert to fraction form
   9,339.16/12,887.92 = 5,090.42/x
3. Step 3: Cross multiply
   9,339.16x = 12,887.92 × 5,090.42
4. Step 4: Simplify right side
   9,339.16x = 65,604,925.73
5. Step 5: Solve for x
   x = 65,604,925.73/9,339.16
6. Step 6: Final answer
   x = 7,024.71