Finding the Fourth Proportional to 10,103.98, 15,139.26 and 5,166.83

Step by Step Solution

1. Step 1: Write the proportion equation
   10,103.98 : 15,139.26 = 5,166.83 : x
2. Step 2: Convert to fraction form
   10,103.98/15,139.26 = 5,166.83/x
3. Step 3: Cross multiply
   10,103.98x = 15,139.26 × 5,166.83
4. Step 4: Simplify right side
   10,103.98x = 78,221,982.75
5. Step 5: Solve for x
   x = 78,221,982.75/10,103.98
6. Step 6: Final answer
   x = 7,741.70