Finding the Fourth Proportional to 1,521.37, 2,280.00 and 1,108.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.37 : 2,280.00 = 1,108.57 : x
2. Step 2: Convert to fraction form
   1,521.37/2,280.00 = 1,108.57/x
3. Step 3: Cross multiply
   1,521.37x = 2,280.00 × 1,108.57
4. Step 4: Simplify right side
   1,521.37x = 2,527,534.06
5. Step 5: Solve for x
   x = 2,527,534.06/1,521.37
6. Step 6: Final answer
   x = 1,661.36