Finding the Fourth Proportional to 1,573.47, 2,171.78 and 910.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.47 : 2,171.78 = 910.23 : x
2. Step 2: Convert to fraction form
   1,573.47/2,171.78 = 910.23/x
3. Step 3: Cross multiply
   1,573.47x = 2,171.78 × 910.23
4. Step 4: Simplify right side
   1,573.47x = 1,976,814.76
5. Step 5: Solve for x
   x = 1,976,814.76/1,573.47
6. Step 6: Final answer
   x = 1,256.34