Finding the Fourth Proportional to 2,667.52, 3,997.64 and 1,691.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.52 : 3,997.64 = 1,691.88 : x
2. Step 2: Convert to fraction form
   2,667.52/3,997.64 = 1,691.88/x
3. Step 3: Cross multiply
   2,667.52x = 3,997.64 × 1,691.88
4. Step 4: Simplify right side
   2,667.52x = 6,763,527.16
5. Step 5: Solve for x
   x = 6,763,527.16/2,667.52
6. Step 6: Final answer
   x = 2,535.51