Finding the Fourth Proportional to 2,116.59, 2,917.65 and 1,667.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.59 : 2,917.65 = 1,667.64 : x
2. Step 2: Convert to fraction form
   2,116.59/2,917.65 = 1,667.64/x
3. Step 3: Cross multiply
   2,116.59x = 2,917.65 × 1,667.64
4. Step 4: Simplify right side
   2,116.59x = 4,865,589.85
5. Step 5: Solve for x
   x = 4,865,589.85/2,116.59
6. Step 6: Final answer
   x = 2,298.79