Finding the Fourth Proportional to 40,689.16, 56,147.82 and 22,780

Step by Step Solution

1. Step 1: Write the proportion equation
   40,689.16 : 56,147.82 = 22,780 : x
2. Step 2: Convert to fraction form
   40,689.16/56,147.82 = 22,780/x
3. Step 3: Cross multiply
   40,689.16x = 56,147.82 × 22,780
4. Step 4: Simplify right side
   40,689.16x = 1,279,047,339.60
5. Step 5: Solve for x
   x = 1,279,047,339.60/40,689.16
6. Step 6: Final answer
   x = 31,434.60