Finding the Fourth Proportional to 1,573.43, 2,171.16 and 910.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.43 : 2,171.16 = 910.15 : x
2. Step 2: Convert to fraction form
   1,573.43/2,171.16 = 910.15/x
3. Step 3: Cross multiply
   1,573.43x = 2,171.16 × 910.15
4. Step 4: Simplify right side
   1,573.43x = 1,976,073.29
5. Step 5: Solve for x
   x = 1,976,073.29/1,573.43
6. Step 6: Final answer
   x = 1,255.91