Finding the Fourth Proportional to 2,667.78, 3,680.10 and 1,672.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.78 : 3,680.10 = 1,672.86 : x
2. Step 2: Convert to fraction form
   2,667.78/3,680.10 = 1,672.86/x
3. Step 3: Cross multiply
   2,667.78x = 3,680.10 × 1,672.86
4. Step 4: Simplify right side
   2,667.78x = 6,156,292.09
5. Step 5: Solve for x
   x = 6,156,292.09/2,667.78
6. Step 6: Final answer
   x = 2,307.65