Finding the Fourth Proportional to 10,668.80, 15,909.86 and 10,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,668.80 : 15,909.86 = 10,086.50 : x
2. Step 2: Convert to fraction form
   10,668.80/15,909.86 = 10,086.50/x
3. Step 3: Cross multiply
   10,668.80x = 15,909.86 × 10,086.50
4. Step 4: Simplify right side
   10,668.80x = 160,474,802.89
5. Step 5: Solve for x
   x = 160,474,802.89/10,668.80
6. Step 6: Final answer
   x = 15,041.50