Finding the Fourth Proportional to 9,222.96, 12,726.72 and 5,687.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,222.96 : 12,726.72 = 5,687.76 : x
2. Step 2: Convert to fraction form
   9,222.96/12,726.72 = 5,687.76/x
3. Step 3: Cross multiply
   9,222.96x = 12,726.72 × 5,687.76
4. Step 4: Simplify right side
   9,222.96x = 72,386,528.95
5. Step 5: Solve for x
   x = 72,386,528.95/9,222.96
6. Step 6: Final answer
   x = 7,848.51