Finding the Fourth Proportional to 22,714, 31,345.32 and 12,778

Step by Step Solution

1. Step 1: Write the proportion equation
   22,714 : 31,345.32 = 12,778 : x
2. Step 2: Convert to fraction form
   22,714/31,345.32 = 12,778/x
3. Step 3: Cross multiply
   22,714x = 31,345.32 × 12,778
4. Step 4: Simplify right side
   22,714x = 400,530,498.96
5. Step 5: Solve for x
   x = 400,530,498.96/22,714
6. Step 6: Final answer
   x = 17,633.64