Finding the Fourth Proportional to 1,406.51, 1,939.60 and 910.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.51 : 1,939.60 = 910.34 : x
2. Step 2: Convert to fraction form
   1,406.51/1,939.60 = 910.34/x
3. Step 3: Cross multiply
   1,406.51x = 1,939.60 × 910.34
4. Step 4: Simplify right side
   1,406.51x = 1,765,689.06
5. Step 5: Solve for x
   x = 1,765,689.06/1,406.51
6. Step 6: Final answer
   x = 1,255.37