Finding the Fourth Proportional to 1,407.31, 1,942.83 and 910.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.31 : 1,942.83 = 910.23 : x
2. Step 2: Convert to fraction form
   1,407.31/1,942.83 = 910.23/x
3. Step 3: Cross multiply
   1,407.31x = 1,942.83 × 910.23
4. Step 4: Simplify right side
   1,407.31x = 1,768,422.15
5. Step 5: Solve for x
   x = 1,768,422.15/1,407.31
6. Step 6: Final answer
   x = 1,256.60