Finding the Fourth Proportional to 1,090.42, 1,505.25 and 758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.42 : 1,505.25 = 758.72 : x
2. Step 2: Convert to fraction form
   1,090.42/1,505.25 = 758.72/x
3. Step 3: Cross multiply
   1,090.42x = 1,505.25 × 758.72
4. Step 4: Simplify right side
   1,090.42x = 1,142,067.04
5. Step 5: Solve for x
   x = 1,142,067.04/1,090.42
6. Step 6: Final answer
   x = 1,047.37