Finding the Fourth Proportional to 16,500.79, 22,761.89 and 9,779.95

Step by Step Solution

1. Step 1: Write the proportion equation
   16,500.79 : 22,761.89 = 9,779.95 : x
2. Step 2: Convert to fraction form
   16,500.79/22,761.89 = 9,779.95/x
3. Step 3: Cross multiply
   16,500.79x = 22,761.89 × 9,779.95
4. Step 4: Simplify right side
   16,500.79x = 222,610,032.30
5. Step 5: Solve for x
   x = 222,610,032.30/16,500.79
6. Step 6: Final answer
   x = 13,490.88