Finding the Fourth Proportional to 1,405.35, 2,105.20 and 700.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.35 : 2,105.20 = 700.43 : x
2. Step 2: Convert to fraction form
   1,405.35/2,105.20 = 700.43/x
3. Step 3: Cross multiply
   1,405.35x = 2,105.20 × 700.43
4. Step 4: Simplify right side
   1,405.35x = 1,474,548.75
5. Step 5: Solve for x
   x = 1,474,548.75/1,405.35
6. Step 6: Final answer
   x = 1,049.24