Finding the Fourth Proportional to 1,659.67, 2,290.38 and 913.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.67 : 2,290.38 = 913.69 : x
2. Step 2: Convert to fraction form
   1,659.67/2,290.38 = 913.69/x
3. Step 3: Cross multiply
   1,659.67x = 2,290.38 × 913.69
4. Step 4: Simplify right side
   1,659.67x = 2,092,697.30
5. Step 5: Solve for x
   x = 2,092,697.30/1,659.67
6. Step 6: Final answer
   x = 1,260.91