Finding the Fourth Proportional to 40,061.91, 55,283.19 and 21,909.02

Step by Step Solution

1. Step 1: Write the proportion equation
   40,061.91 : 55,283.19 = 21,909.02 : x
2. Step 2: Convert to fraction form
   40,061.91/55,283.19 = 21,909.02/x
3. Step 3: Cross multiply
   40,061.91x = 55,283.19 × 21,909.02
4. Step 4: Simplify right side
   40,061.91x = 1,211,200,515.37
5. Step 5: Solve for x
   x = 1,211,200,515.37/40,061.91
6. Step 6: Final answer
   x = 30,233.22