Finding the Fourth Proportional to 2,618.79, 3,926.54 and 1,231.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.79 : 3,926.54 = 1,231.53 : x
2. Step 2: Convert to fraction form
   2,618.79/3,926.54 = 1,231.53/x
3. Step 3: Cross multiply
   2,618.79x = 3,926.54 × 1,231.53
4. Step 4: Simplify right side
   2,618.79x = 4,835,645.65
5. Step 5: Solve for x
   x = 4,835,645.65/2,618.79
6. Step 6: Final answer
   x = 1,846.52