Finding the Fourth Proportional to 1,573.51, 2,171.37 and 910.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.51 : 2,171.37 = 910.43 : x
2. Step 2: Convert to fraction form
   1,573.51/2,171.37 = 910.43/x
3. Step 3: Cross multiply
   1,573.51x = 2,171.37 × 910.43
4. Step 4: Simplify right side
   1,573.51x = 1,976,880.39
5. Step 5: Solve for x
   x = 1,976,880.39/1,573.51
6. Step 6: Final answer
   x = 1,256.35