Finding the Fourth Proportional to 1,405.33, 2,109.27 and 712.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.33 : 2,109.27 = 712.46 : x
2. Step 2: Convert to fraction form
   1,405.33/2,109.27 = 712.46/x
3. Step 3: Cross multiply
   1,405.33x = 2,109.27 × 712.46
4. Step 4: Simplify right side
   1,405.33x = 1,502,770.50
5. Step 5: Solve for x
   x = 1,502,770.50/1,405.33
6. Step 6: Final answer
   x = 1,069.34