Finding the Fourth Proportional to 1,575.43, 2,174.11 and 876.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.43 : 2,174.11 = 876.80 : x
2. Step 2: Convert to fraction form
   1,575.43/2,174.11 = 876.80/x
3. Step 3: Cross multiply
   1,575.43x = 2,174.11 × 876.80
4. Step 4: Simplify right side
   1,575.43x = 1,906,262.89
5. Step 5: Solve for x
   x = 1,906,262.89/1,575.43
6. Step 6: Final answer
   x = 1,210.00