Finding the Fourth Proportional to 39,912.84, 55,075.50 and 22,006.78

Step by Step Solution

1. Step 1: Write the proportion equation
   39,912.84 : 55,075.50 = 22,006.78 : x
2. Step 2: Convert to fraction form
   39,912.84/55,075.50 = 22,006.78/x
3. Step 3: Cross multiply
   39,912.84x = 55,075.50 × 22,006.78
4. Step 4: Simplify right side
   39,912.84x = 1,212,034,411.89
5. Step 5: Solve for x
   x = 1,212,034,411.89/39,912.84
6. Step 6: Final answer
   x = 30,367.03