Finding the Fourth Proportional to 1,659.53, 2,290.15 and 913.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.53 : 2,290.15 = 913.54 : x
2. Step 2: Convert to fraction form
   1,659.53/2,290.15 = 913.54/x
3. Step 3: Cross multiply
   1,659.53x = 2,290.15 × 913.54
4. Step 4: Simplify right side
   1,659.53x = 2,092,143.34
5. Step 5: Solve for x
   x = 2,092,143.34/1,659.53
6. Step 6: Final answer
   x = 1,260.69