Finding the Fourth Proportional to 22,075, 30,463.50 and 12,139

Step by Step Solution

1. Step 1: Write the proportion equation
   22,075 : 30,463.50 = 12,139 : x
2. Step 2: Convert to fraction form
   22,075/30,463.50 = 12,139/x
3. Step 3: Cross multiply
   22,075x = 30,463.50 × 12,139
4. Step 4: Simplify right side
   22,075x = 369,796,426.50
5. Step 5: Solve for x
   x = 369,796,426.50/22,075
6. Step 6: Final answer
   x = 16,751.82