Finding the Fourth Proportional to 2,607.31, 3,595.27 and 1,978.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.31 : 3,595.27 = 1,978.99 : x
2. Step 2: Convert to fraction form
   2,607.31/3,595.27 = 1,978.99/x
3. Step 3: Cross multiply
   2,607.31x = 3,595.27 × 1,978.99
4. Step 4: Simplify right side
   2,607.31x = 7,115,003.38
5. Step 5: Solve for x
   x = 7,115,003.38/2,607.31
6. Step 6: Final answer
   x = 2,728.87