Finding the Fourth Proportional to 2,009.59, 3,013.57 and 1,278.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.59 : 3,013.57 = 1,278.16 : x
2. Step 2: Convert to fraction form
   2,009.59/3,013.57 = 1,278.16/x
3. Step 3: Cross multiply
   2,009.59x = 3,013.57 × 1,278.16
4. Step 4: Simplify right side
   2,009.59x = 3,851,824.63
5. Step 5: Solve for x
   x = 3,851,824.63/2,009.59
6. Step 6: Final answer
   x = 1,916.72