Finding the Fourth Proportional to 1,573.75, 2,171.78 and 875.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.75 : 2,171.78 = 875.13 : x
2. Step 2: Convert to fraction form
   1,573.75/2,171.78 = 875.13/x
3. Step 3: Cross multiply
   1,573.75x = 2,171.78 × 875.13
4. Step 4: Simplify right side
   1,573.75x = 1,900,589.83
5. Step 5: Solve for x
   x = 1,900,589.83/1,573.75
6. Step 6: Final answer
   x = 1,207.68