Finding the Fourth Proportional to 2,991.50, 4,128.32 and 1,665.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.50 : 4,128.32 = 1,665.32 : x
2. Step 2: Convert to fraction form
   2,991.50/4,128.32 = 1,665.32/x
3. Step 3: Cross multiply
   2,991.50x = 4,128.32 × 1,665.32
4. Step 4: Simplify right side
   2,991.50x = 6,874,965.54
5. Step 5: Solve for x
   x = 6,874,965.54/2,991.50
6. Step 6: Final answer
   x = 2,298.17