Finding the Fourth Proportional to 2,076.72, 3,115.89 and 615.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.72 : 3,115.89 = 615.89 : x
2. Step 2: Convert to fraction form
   2,076.72/3,115.89 = 615.89/x
3. Step 3: Cross multiply
   2,076.72x = 3,115.89 × 615.89
4. Step 4: Simplify right side
   2,076.72x = 1,919,029.91
5. Step 5: Solve for x
   x = 1,919,029.91/2,076.72
6. Step 6: Final answer
   x = 924.07