Finding the Fourth Proportional to 1,090.59, 1,505.25 and 671.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.59 : 1,505.25 = 671.30 : x
2. Step 2: Convert to fraction form
   1,090.59/1,505.25 = 671.30/x
3. Step 3: Cross multiply
   1,090.59x = 1,505.25 × 671.30
4. Step 4: Simplify right side
   1,090.59x = 1,010,474.33
5. Step 5: Solve for x
   x = 1,010,474.33/1,090.59
6. Step 6: Final answer
   x = 926.54