Finding the Fourth Proportional to 40,061.98, 55,283.28 and 21,909.08

Step by Step Solution

1. Step 1: Write the proportion equation
   40,061.98 : 55,283.28 = 21,909.08 : x
2. Step 2: Convert to fraction form
   40,061.98/55,283.28 = 21,909.08/x
3. Step 3: Cross multiply
   40,061.98x = 55,283.28 × 21,909.08
4. Step 4: Simplify right side
   40,061.98x = 1,211,205,860.23
5. Step 5: Solve for x
   x = 1,211,205,860.23/40,061.98
6. Step 6: Final answer
   x = 30,233.30