Finding the Fourth Proportional to 1,575.40, 2,174.04 and 876.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.40 : 2,174.04 = 876.76 : x
2. Step 2: Convert to fraction form
   1,575.40/2,174.04 = 876.76/x
3. Step 3: Cross multiply
   1,575.40x = 2,174.04 × 876.76
4. Step 4: Simplify right side
   1,575.40x = 1,906,111.31
5. Step 5: Solve for x
   x = 1,906,111.31/1,575.40
6. Step 6: Final answer
   x = 1,209.92