Finding the Fourth Proportional to 40,638.80, 56,079.78 and 22,730.42

Step by Step Solution

1. Step 1: Write the proportion equation
   40,638.80 : 56,079.78 = 22,730.42 : x
2. Step 2: Convert to fraction form
   40,638.80/56,079.78 = 22,730.42/x
3. Step 3: Cross multiply
   40,638.80x = 56,079.78 × 22,730.42
4. Step 4: Simplify right side
   40,638.80x = 1,274,716,952.91
5. Step 5: Solve for x
   x = 1,274,716,952.91/40,638.80
6. Step 6: Final answer
   x = 31,366.99