Finding the Fourth Proportional to 10,390.86, 14,329.89 and 8,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.86 : 14,329.89 = 8,122.50 : x
2. Step 2: Convert to fraction form
   10,390.86/14,329.89 = 8,122.50/x
3. Step 3: Cross multiply
   10,390.86x = 14,329.89 × 8,122.50
4. Step 4: Simplify right side
   10,390.86x = 116,394,531.53
5. Step 5: Solve for x
   x = 116,394,531.53/10,390.86
6. Step 6: Final answer
   x = 11,201.63