Finding the Fourth Proportional to 22,779.28, 31,435.50 and 12,708.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,779.28 : 31,435.50 = 12,708.33 : x
2. Step 2: Convert to fraction form
   22,779.28/31,435.50 = 12,708.33/x
3. Step 3: Cross multiply
   22,779.28x = 31,435.50 × 12,708.33
4. Step 4: Simplify right side
   22,779.28x = 399,492,707.72
5. Step 5: Solve for x
   x = 399,492,707.72/22,779.28
6. Step 6: Final answer
   x = 17,537.55