Finding the Fourth Proportional to 2,165.64, 2,989.91 and 1,667.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.64 : 2,989.91 = 1,667.32 : x
2. Step 2: Convert to fraction form
   2,165.64/2,989.91 = 1,667.32/x
3. Step 3: Cross multiply
   2,165.64x = 2,989.91 × 1,667.32
4. Step 4: Simplify right side
   2,165.64x = 4,985,133.43
5. Step 5: Solve for x
   x = 4,985,133.43/2,165.64
6. Step 6: Final answer
   x = 2,301.93