Finding the Fourth Proportional to 9,776.88, 14,654.16 and 3,929.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,776.88 : 14,654.16 = 3,929.76 : x
2. Step 2: Convert to fraction form
   9,776.88/14,654.16 = 3,929.76/x
3. Step 3: Cross multiply
   9,776.88x = 14,654.16 × 3,929.76
4. Step 4: Simplify right side
   9,776.88x = 57,587,331.80
5. Step 5: Solve for x
   x = 57,587,331.80/9,776.88
6. Step 6: Final answer
   x = 5,890.15