Finding the Fourth Proportional to 1,090.72, 1,626.08 and 1,017.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.72 : 1,626.08 = 1,017.76 : x
2. Step 2: Convert to fraction form
   1,090.72/1,626.08 = 1,017.76/x
3. Step 3: Cross multiply
   1,090.72x = 1,626.08 × 1,017.76
4. Step 4: Simplify right side
   1,090.72x = 1,654,959.18
5. Step 5: Solve for x
   x = 1,654,959.18/1,090.72
6. Step 6: Final answer
   x = 1,517.31