Finding the Fourth Proportional to 2,315.88, 3,475.59 and 1,618

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.88 : 3,475.59 = 1,618 : x
2. Step 2: Convert to fraction form
   2,315.88/3,475.59 = 1,618/x
3. Step 3: Cross multiply
   2,315.88x = 3,475.59 × 1,618
4. Step 4: Simplify right side
   2,315.88x = 5,623,504.62
5. Step 5: Solve for x
   x = 5,623,504.62/2,315.88
6. Step 6: Final answer
   x = 2,428.24