Finding the Fourth Proportional to 10,861.31, 14,987.09 and 6,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,861.31 : 14,987.09 = 6,081.50 : x
2. Step 2: Convert to fraction form
   10,861.31/14,987.09 = 6,081.50/x
3. Step 3: Cross multiply
   10,861.31x = 14,987.09 × 6,081.50
4. Step 4: Simplify right side
   10,861.31x = 91,144,040.51
5. Step 5: Solve for x
   x = 91,144,040.51/10,861.31
6. Step 6: Final answer
   x = 8,391.62