Finding the Fourth Proportional to 10,615.41, 14,646.89 and 6,139.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,615.41 : 14,646.89 = 6,139.05 : x
2. Step 2: Convert to fraction form
   10,615.41/14,646.89 = 6,139.05/x
3. Step 3: Cross multiply
   10,615.41x = 14,646.89 × 6,139.05
4. Step 4: Simplify right side
   10,615.41x = 89,917,990.05
5. Step 5: Solve for x
   x = 89,917,990.05/10,615.41
6. Step 6: Final answer
   x = 8,470.52