Finding the Fourth Proportional to 1,659.80, 2,290.59 and 913.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.80 : 2,290.59 = 913.82 : x
2. Step 2: Convert to fraction form
   1,659.80/2,290.59 = 913.82/x
3. Step 3: Cross multiply
   1,659.80x = 2,290.59 × 913.82
4. Step 4: Simplify right side
   1,659.80x = 2,093,186.95
5. Step 5: Solve for x
   x = 2,093,186.95/1,659.80
6. Step 6: Final answer
   x = 1,261.11