Finding the Fourth Proportional to 1,659.98, 2,489.56 and 1,115.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.98 : 2,489.56 = 1,115.46 : x
2. Step 2: Convert to fraction form
   1,659.98/2,489.56 = 1,115.46/x
3. Step 3: Cross multiply
   1,659.98x = 2,489.56 × 1,115.46
4. Step 4: Simplify right side
   1,659.98x = 2,777,001.81
5. Step 5: Solve for x
   x = 2,777,001.81/1,659.98
6. Step 6: Final answer
   x = 1,672.91