Finding the Fourth Proportional to 9,300.80, 12,801.72 and 8,414.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.80 : 12,801.72 = 8,414.72 : x
2. Step 2: Convert to fraction form
   9,300.80/12,801.72 = 8,414.72/x
3. Step 3: Cross multiply
   9,300.80x = 12,801.72 × 8,414.72
4. Step 4: Simplify right side
   9,300.80x = 107,722,889.32
5. Step 5: Solve for x
   x = 107,722,889.32/9,300.80
6. Step 6: Final answer
   x = 11,582.11