Finding the Fourth Proportional to 9,488.57, 13,094.16 and 5,239.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,488.57 : 13,094.16 = 5,239.90 : x
2. Step 2: Convert to fraction form
   9,488.57/13,094.16 = 5,239.90/x
3. Step 3: Cross multiply
   9,488.57x = 13,094.16 × 5,239.90
4. Step 4: Simplify right side
   9,488.57x = 68,612,023.51
5. Step 5: Solve for x
   x = 68,612,023.51/9,488.57
6. Step 6: Final answer
   x = 7,231.02