Finding the Fourth Proportional to 1,870.72, 2,580.85 and 1,084.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.72 : 2,580.85 = 1,084.61 : x
2. Step 2: Convert to fraction form
   1,870.72/2,580.85 = 1,084.61/x
3. Step 3: Cross multiply
   1,870.72x = 2,580.85 × 1,084.61
4. Step 4: Simplify right side
   1,870.72x = 2,799,215.72
5. Step 5: Solve for x
   x = 2,799,215.72/1,870.72
6. Step 6: Final answer
   x = 1,496.33