Finding the Fourth Proportional to 2,402.78, 3,315.89 and 1,354.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.78 : 3,315.89 = 1,354.85 : x
2. Step 2: Convert to fraction form
   2,402.78/3,315.89 = 1,354.85/x
3. Step 3: Cross multiply
   2,402.78x = 3,315.89 × 1,354.85
4. Step 4: Simplify right side
   2,402.78x = 4,492,516.99
5. Step 5: Solve for x
   x = 4,492,516.99/2,402.78
6. Step 6: Final answer
   x = 1,869.72