Finding the Fourth Proportional to 1,575.30, 2,174.00 and 876.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.30 : 2,174.00 = 876.72 : x
2. Step 2: Convert to fraction form
   1,575.30/2,174.00 = 876.72/x
3. Step 3: Cross multiply
   1,575.30x = 2,174.00 × 876.72
4. Step 4: Simplify right side
   1,575.30x = 1,905,984.90
5. Step 5: Solve for x
   x = 1,905,984.90/1,575.30
6. Step 6: Final answer
   x = 1,209.92