Finding the Fourth Proportional to 39,909.83, 55,075.35 and 21,761.52

Step by Step Solution

1. Step 1: Write the proportion equation
   39,909.83 : 55,075.35 = 21,761.52 : x
2. Step 2: Convert to fraction form
   39,909.83/55,075.35 = 21,761.52/x
3. Step 3: Cross multiply
   39,909.83x = 55,075.35 × 21,761.52
4. Step 4: Simplify right side
   39,909.83x = 1,198,523,522.62
5. Step 5: Solve for x
   x = 1,198,523,522.62/39,909.83
6. Step 6: Final answer
   x = 30,030.79