Finding the Fourth Proportional to 10,807.50, 14,910.72 and 8,814.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,807.50 : 14,910.72 = 8,814.60 : x
2. Step 2: Convert to fraction form
   10,807.50/14,910.72 = 8,814.60/x
3. Step 3: Cross multiply
   10,807.50x = 14,910.72 × 8,814.60
4. Step 4: Simplify right side
   10,807.50x = 131,432,032.51
5. Step 5: Solve for x
   x = 131,432,032.51/10,807.50
6. Step 6: Final answer
   x = 12,161.19