Finding the Fourth Proportional to 2,499.78, 3,449.72 and 1,365.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.78 : 3,449.72 = 1,365.42 : x
2. Step 2: Convert to fraction form
   2,499.78/3,449.72 = 1,365.42/x
3. Step 3: Cross multiply
   2,499.78x = 3,449.72 × 1,365.42
4. Step 4: Simplify right side
   2,499.78x = 4,710,325.35
5. Step 5: Solve for x
   x = 4,710,325.35/2,499.78
6. Step 6: Final answer
   x = 1,884.29