Finding the Fourth Proportional to 1,405.80, 2,105.04 and 753.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.80 : 2,105.04 = 753.34 : x
2. Step 2: Convert to fraction form
   1,405.80/2,105.04 = 753.34/x
3. Step 3: Cross multiply
   1,405.80x = 2,105.04 × 753.34
4. Step 4: Simplify right side
   1,405.80x = 1,585,810.83
5. Step 5: Solve for x
   x = 1,585,810.83/1,405.80
6. Step 6: Final answer
   x = 1,128.05