Finding the Fourth Proportional to 22,758.04, 31,406.02 and 12,686.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,758.04 : 31,406.02 = 12,686.37 : x
2. Step 2: Convert to fraction form
   22,758.04/31,406.02 = 12,686.37/x
3. Step 3: Cross multiply
   22,758.04x = 31,406.02 × 12,686.37
4. Step 4: Simplify right side
   22,758.04x = 398,428,389.95
5. Step 5: Solve for x
   x = 398,428,389.95/22,758.04
6. Step 6: Final answer
   x = 17,507.15