Finding the Fourth Proportional to 22,761.74, 31,413.56 and 13,690.04

Step by Step Solution

1. Step 1: Write the proportion equation
   22,761.74 : 31,413.56 = 13,690.04 : x
2. Step 2: Convert to fraction form
   22,761.74/31,413.56 = 13,690.04/x
3. Step 3: Cross multiply
   22,761.74x = 31,413.56 × 13,690.04
4. Step 4: Simplify right side
   22,761.74x = 430,052,667.42
5. Step 5: Solve for x
   x = 430,052,667.42/22,761.74
6. Step 6: Final answer
   x = 18,893.66