Finding the Fourth Proportional to 8,964.72, 12,371.61 and 4,931.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,964.72 : 12,371.61 = 4,931.72 : x
2. Step 2: Convert to fraction form
   8,964.72/12,371.61 = 4,931.72/x
3. Step 3: Cross multiply
   8,964.72x = 12,371.61 × 4,931.72
4. Step 4: Simplify right side
   8,964.72x = 61,013,254.61
5. Step 5: Solve for x
   x = 61,013,254.61/8,964.72
6. Step 6: Final answer
   x = 6,805.93