Finding the Fourth Proportional to 22,561.54, 31,112.10 and 13,603.75

Step by Step Solution

1. Step 1: Write the proportion equation
   22,561.54 : 31,112.10 = 13,603.75 : x
2. Step 2: Convert to fraction form
   22,561.54/31,112.10 = 13,603.75/x
3. Step 3: Cross multiply
   22,561.54x = 31,112.10 × 13,603.75
4. Step 4: Simplify right side
   22,561.54x = 423,241,152.59
5. Step 5: Solve for x
   x = 423,241,152.59/22,561.54
6. Step 6: Final answer
   x = 18,759.41