Finding the Fourth Proportional to 1,573.31, 2,171.17 and 874.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.31 : 2,171.17 = 874.69 : x
2. Step 2: Convert to fraction form
   1,573.31/2,171.17 = 874.69/x
3. Step 3: Cross multiply
   1,573.31x = 2,171.17 × 874.69
4. Step 4: Simplify right side
   1,573.31x = 1,899,096.35
5. Step 5: Solve for x
   x = 1,899,096.35/1,573.31
6. Step 6: Final answer
   x = 1,207.07