Finding the Fourth Proportional to 9,139.98, 12,613.17 and 4,948.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.98 : 12,613.17 = 4,948.23 : x
2. Step 2: Convert to fraction form
   9,139.98/12,613.17 = 4,948.23/x
3. Step 3: Cross multiply
   9,139.98x = 12,613.17 × 4,948.23
4. Step 4: Simplify right side
   9,139.98x = 62,412,866.19
5. Step 5: Solve for x
   x = 62,412,866.19/9,139.98
6. Step 6: Final answer
   x = 6,828.56