Finding the Fourth Proportional to 22,485.39, 31,033.50 and 13,411.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,485.39 : 31,033.50 = 13,411.90 : x
2. Step 2: Convert to fraction form
   22,485.39/31,033.50 = 13,411.90/x
3. Step 3: Cross multiply
   22,485.39x = 31,033.50 × 13,411.90
4. Step 4: Simplify right side
   22,485.39x = 416,218,131.59
5. Step 5: Solve for x
   x = 416,218,131.59/22,485.39
6. Step 6: Final answer
   x = 18,510.61