Finding the Fourth Proportional to 1,659.79, 2,290.56 and 913.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.79 : 2,290.56 = 913.77 : x
2. Step 2: Convert to fraction form
   1,659.79/2,290.56 = 913.77/x
3. Step 3: Cross multiply
   1,659.79x = 2,290.56 × 913.77
4. Step 4: Simplify right side
   1,659.79x = 2,093,033.56
5. Step 5: Solve for x
   x = 2,093,033.56/1,659.79
6. Step 6: Final answer
   x = 1,261.02