Finding the Fourth Proportional to 2,678.06, 3,684.72 and 2,615.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.06 : 3,684.72 = 2,615.88 : x
2. Step 2: Convert to fraction form
   2,678.06/3,684.72 = 2,615.88/x
3. Step 3: Cross multiply
   2,678.06x = 3,684.72 × 2,615.88
4. Step 4: Simplify right side
   2,678.06x = 9,638,785.35
5. Step 5: Solve for x
   x = 9,638,785.35/2,678.06
6. Step 6: Final answer
   x = 3,599.17