Finding the Fourth Proportional to 2,447.59, 3,672.43 and 1,278.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,447.59 : 3,672.43 = 1,278.47 : x
2. Step 2: Convert to fraction form
   2,447.59/3,672.43 = 1,278.47/x
3. Step 3: Cross multiply
   2,447.59x = 3,672.43 × 1,278.47
4. Step 4: Simplify right side
   2,447.59x = 4,695,091.58
5. Step 5: Solve for x
   x = 4,695,091.58/2,447.59
6. Step 6: Final answer
   x = 1,918.25