Finding the Fourth Proportional to 7,300.24, 10,939.86 and 3,139.08

Step by Step Solution

1. Step 1: Write the proportion equation
   7,300.24 : 10,939.86 = 3,139.08 : x
2. Step 2: Convert to fraction form
   7,300.24/10,939.86 = 3,139.08/x
3. Step 3: Cross multiply
   7,300.24x = 10,939.86 × 3,139.08
4. Step 4: Simplify right side
   7,300.24x = 34,341,095.73
5. Step 5: Solve for x
   x = 34,341,095.73/7,300.24
6. Step 6: Final answer
   x = 4,704.11