Finding the Fourth Proportional to 1,659.98, 2,290.73 and 913.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.98 : 2,290.73 = 913.94 : x
2. Step 2: Convert to fraction form
   1,659.98/2,290.73 = 913.94/x
3. Step 3: Cross multiply
   1,659.98x = 2,290.73 × 913.94
4. Step 4: Simplify right side
   1,659.98x = 2,093,573.75
5. Step 5: Solve for x
   x = 2,093,573.75/1,659.98
6. Step 6: Final answer
   x = 1,261.21