Finding the Fourth Proportional to 2,206.74, 3,308.94 and 972.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,206.74 : 3,308.94 = 972.72 : x
2. Step 2: Convert to fraction form
   2,206.74/3,308.94 = 972.72/x
3. Step 3: Cross multiply
   2,206.74x = 3,308.94 × 972.72
4. Step 4: Simplify right side
   2,206.74x = 3,218,672.12
5. Step 5: Solve for x
   x = 3,218,672.12/2,206.74
6. Step 6: Final answer
   x = 1,458.56