Finding the Fourth Proportional to 2,220.54, 3,063.33 and 1,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,220.54 : 3,063.33 = 1,288.50 : x
2. Step 2: Convert to fraction form
   2,220.54/3,063.33 = 1,288.50/x
3. Step 3: Cross multiply
   2,220.54x = 3,063.33 × 1,288.50
4. Step 4: Simplify right side
   2,220.54x = 3,947,100.71
5. Step 5: Solve for x
   x = 3,947,100.71/2,220.54
6. Step 6: Final answer
   x = 1,777.54