Finding the Fourth Proportional to 1,521.47, 2,280.38 and 698.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.47 : 2,280.38 = 698.61 : x
2. Step 2: Convert to fraction form
   1,521.47/2,280.38 = 698.61/x
3. Step 3: Cross multiply
   1,521.47x = 2,280.38 × 698.61
4. Step 4: Simplify right side
   1,521.47x = 1,593,096.27
5. Step 5: Solve for x
   x = 1,593,096.27/1,521.47
6. Step 6: Final answer
   x = 1,047.08