Finding the Fourth Proportional to 40,012.72, 55,218.67 and 22,108.88

Step by Step Solution

1. Step 1: Write the proportion equation
   40,012.72 : 55,218.67 = 22,108.88 : x
2. Step 2: Convert to fraction form
   40,012.72/55,218.67 = 22,108.88/x
3. Step 3: Cross multiply
   40,012.72x = 55,218.67 × 22,108.88
4. Step 4: Simplify right side
   40,012.72x = 1,220,823,031.56
5. Step 5: Solve for x
   x = 1,220,823,031.56/40,012.72
6. Step 6: Final answer
   x = 30,510.88