Finding the Fourth Proportional to 3,356.32, 5,028.72 and 2,665.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,356.32 : 5,028.72 = 2,665.12 : x
2. Step 2: Convert to fraction form
   3,356.32/5,028.72 = 2,665.12/x
3. Step 3: Cross multiply
   3,356.32x = 5,028.72 × 2,665.12
4. Step 4: Simplify right side
   3,356.32x = 13,402,142.25
5. Step 5: Solve for x
   x = 13,402,142.25/3,356.32
6. Step 6: Final answer
   x = 3,993.11