Finding the Fourth Proportional to 1,399.89, 2,098.81 and 706.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.89 : 2,098.81 = 706.24 : x
2. Step 2: Convert to fraction form
   1,399.89/2,098.81 = 706.24/x
3. Step 3: Cross multiply
   1,399.89x = 2,098.81 × 706.24
4. Step 4: Simplify right side
   1,399.89x = 1,482,263.57
5. Step 5: Solve for x
   x = 1,482,263.57/1,399.89
6. Step 6: Final answer
   x = 1,058.84