Finding the Fourth Proportional to 1,399.59, 2,100.42 and 706.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.59 : 2,100.42 = 706.08 : x
2. Step 2: Convert to fraction form
   1,399.59/2,100.42 = 706.08/x
3. Step 3: Cross multiply
   1,399.59x = 2,100.42 × 706.08
4. Step 4: Simplify right side
   1,399.59x = 1,483,064.55
5. Step 5: Solve for x
   x = 1,483,064.55/1,399.59
6. Step 6: Final answer
   x = 1,059.64