Finding the Fourth Proportional to 10,860.87, 14,988.50 and 8,498.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,860.87 : 14,988.50 = 8,498.91 : x
2. Step 2: Convert to fraction form
   10,860.87/14,988.50 = 8,498.91/x
3. Step 3: Cross multiply
   10,860.87x = 14,988.50 × 8,498.91
4. Step 4: Simplify right side
   10,860.87x = 127,385,870.04
5. Step 5: Solve for x
   x = 127,385,870.04/10,860.87
6. Step 6: Final answer
   x = 11,728.88