Finding the Fourth Proportional to 10,772.72, 14,862.78 and 8,779.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,772.72 : 14,862.78 = 8,779.85 : x
2. Step 2: Convert to fraction form
   10,772.72/14,862.78 = 8,779.85/x
3. Step 3: Cross multiply
   10,772.72x = 14,862.78 × 8,779.85
4. Step 4: Simplify right side
   10,772.72x = 130,492,978.98
5. Step 5: Solve for x
   x = 130,492,978.98/10,772.72
6. Step 6: Final answer
   x = 12,113.28