Finding the Fourth Proportional to 1,436.28, 2,155.22 and 705.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.28 : 2,155.22 = 705.87 : x
2. Step 2: Convert to fraction form
   1,436.28/2,155.22 = 705.87/x
3. Step 3: Cross multiply
   1,436.28x = 2,155.22 × 705.87
4. Step 4: Simplify right side
   1,436.28x = 1,521,301.61
5. Step 5: Solve for x
   x = 1,521,301.61/1,436.28
6. Step 6: Final answer
   x = 1,059.20