Finding the Fourth Proportional to 3,607.56, 4,978.58 and 2,115.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,607.56 : 4,978.58 = 2,115.27 : x
2. Step 2: Convert to fraction form
   3,607.56/4,978.58 = 2,115.27/x
3. Step 3: Cross multiply
   3,607.56x = 4,978.58 × 2,115.27
4. Step 4: Simplify right side
   3,607.56x = 10,531,030.34
5. Step 5: Solve for x
   x = 10,531,030.34/3,607.56
6. Step 6: Final answer
   x = 2,919.16