Finding the Fourth Proportional to 8,807.86, 12,147.89 and 7,800.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,807.86 : 12,147.89 = 7,800.63 : x
2. Step 2: Convert to fraction form
   8,807.86/12,147.89 = 7,800.63/x
3. Step 3: Cross multiply
   8,807.86x = 12,147.89 × 7,800.63
4. Step 4: Simplify right side
   8,807.86x = 94,761,194.05
5. Step 5: Solve for x
   x = 94,761,194.05/8,807.86
6. Step 6: Final answer
   x = 10,758.70