Finding the Fourth Proportional to 39,965.81, 55,153.27 and 22,061.57

Step by Step Solution

1. Step 1: Write the proportion equation
   39,965.81 : 55,153.27 = 22,061.57 : x
2. Step 2: Convert to fraction form
   39,965.81/55,153.27 = 22,061.57/x
3. Step 3: Cross multiply
   39,965.81x = 55,153.27 × 22,061.57
4. Step 4: Simplify right side
   39,965.81x = 1,216,767,726.83
5. Step 5: Solve for x
   x = 1,216,767,726.83/39,965.81
6. Step 6: Final answer
   x = 30,445.22