Finding the Fourth Proportional to 22,612.50, 31,205.25 and 13,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,612.50 : 31,205.25 = 13,780.50 : x
2. Step 2: Convert to fraction form
   22,612.50/31,205.25 = 13,780.50/x
3. Step 3: Cross multiply
   22,612.50x = 31,205.25 × 13,780.50
4. Step 4: Simplify right side
   22,612.50x = 430,023,947.63
5. Step 5: Solve for x
   x = 430,023,947.63/22,612.50
6. Step 6: Final answer
   x = 19,017.09