Finding the Fourth Proportional to 2,052.50, 2,831.55 and 1,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,052.50 : 2,831.55 = 1,557.50 : x
2. Step 2: Convert to fraction form
   2,052.50/2,831.55 = 1,557.50/x
3. Step 3: Cross multiply
   2,052.50x = 2,831.55 × 1,557.50
4. Step 4: Simplify right side
   2,052.50x = 4,410,139.13
5. Step 5: Solve for x
   x = 4,410,139.13/2,052.50
6. Step 6: Final answer
   x = 2,148.67