Finding the Fourth Proportional to 9,007.79, 12,427.27 and 5,644.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,007.79 : 12,427.27 = 5,644.76 : x
2. Step 2: Convert to fraction form
   9,007.79/12,427.27 = 5,644.76/x
3. Step 3: Cross multiply
   9,007.79x = 12,427.27 × 5,644.76
4. Step 4: Simplify right side
   9,007.79x = 70,148,956.61
5. Step 5: Solve for x
   x = 70,148,956.61/9,007.79
6. Step 6: Final answer
   x = 7,787.59