Finding the Fourth Proportional to 2,658.88, 3,670.72 and 1,665.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.88 : 3,670.72 = 1,665.12 : x
2. Step 2: Convert to fraction form
   2,658.88/3,670.72 = 1,665.12/x
3. Step 3: Cross multiply
   2,658.88x = 3,670.72 × 1,665.12
4. Step 4: Simplify right side
   2,658.88x = 6,112,189.29
5. Step 5: Solve for x
   x = 6,112,189.29/2,658.88
6. Step 6: Final answer
   x = 2,298.78