Finding the Fourth Proportional to 9,489.52, 14,238.74 and 5,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,489.52 : 14,238.74 = 5,978.72 : x
2. Step 2: Convert to fraction form
   9,489.52/14,238.74 = 5,978.72/x
3. Step 3: Cross multiply
   9,489.52x = 14,238.74 × 5,978.72
4. Step 4: Simplify right side
   9,489.52x = 85,129,439.61
5. Step 5: Solve for x
   x = 85,129,439.61/9,489.52
6. Step 6: Final answer
   x = 8,970.89