Finding the Fourth Proportional to 9,906.72, 14,824.65 and 8,605.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,906.72 : 14,824.65 = 8,605.79 : x
2. Step 2: Convert to fraction form
   9,906.72/14,824.65 = 8,605.79/x
3. Step 3: Cross multiply
   9,906.72x = 14,824.65 × 8,605.79
4. Step 4: Simplify right side
   9,906.72x = 127,577,824.72
5. Step 5: Solve for x
   x = 127,577,824.72/9,906.72
6. Step 6: Final answer
   x = 12,877.91