Finding the Fourth Proportional to 3,191.25, 4,400.78 and 3,006.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,191.25 : 4,400.78 = 3,006.72 : x
2. Step 2: Convert to fraction form
   3,191.25/4,400.78 = 3,006.72/x
3. Step 3: Cross multiply
   3,191.25x = 4,400.78 × 3,006.72
4. Step 4: Simplify right side
   3,191.25x = 13,231,915.12
5. Step 5: Solve for x
   x = 13,231,915.12/3,191.25
6. Step 6: Final answer
   x = 4,146.31