Finding the Fourth Proportional to 22,779.72, 31,435.32 and 12,708.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,779.72 : 31,435.32 = 12,708.12 : x
2. Step 2: Convert to fraction form
   22,779.72/31,435.32 = 12,708.12/x
3. Step 3: Cross multiply
   22,779.72x = 31,435.32 × 12,708.12
4. Step 4: Simplify right side
   22,779.72x = 399,483,818.80
5. Step 5: Solve for x
   x = 399,483,818.80/22,779.72
6. Step 6: Final answer
   x = 17,536.82