Finding the Fourth Proportional to 22,075.50, 30,464.19 and 12,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,075.50 : 30,464.19 = 12,139.50 : x
2. Step 2: Convert to fraction form
   22,075.50/30,464.19 = 12,139.50/x
3. Step 3: Cross multiply
   22,075.50x = 30,464.19 × 12,139.50
4. Step 4: Simplify right side
   22,075.50x = 369,820,034.51
5. Step 5: Solve for x
   x = 369,820,034.51/22,075.50
6. Step 6: Final answer
   x = 16,752.51