Finding the Fourth Proportional to 22,758.02, 31,405.02 and 12,687.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,758.02 : 31,405.02 = 12,687.56 : x
2. Step 2: Convert to fraction form
   22,758.02/31,405.02 = 12,687.56/x
3. Step 3: Cross multiply
   22,758.02x = 31,405.02 × 12,687.56
4. Step 4: Simplify right side
   22,758.02x = 398,453,075.55
5. Step 5: Solve for x
   x = 398,453,075.55/22,758.02
6. Step 6: Final answer
   x = 17,508.25