Finding the Fourth Proportional to 10,091.61, 15,139.73 and 5,081.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.61 : 15,139.73 = 5,081.48 : x
2. Step 2: Convert to fraction form
   10,091.61/15,139.73 = 5,081.48/x
3. Step 3: Cross multiply
   10,091.61x = 15,139.73 × 5,081.48
4. Step 4: Simplify right side
   10,091.61x = 76,932,235.20
5. Step 5: Solve for x
   x = 76,932,235.20/10,091.61
6. Step 6: Final answer
   x = 7,623.39