Finding the Fourth Proportional to 2,615.62, 3,924.06 and 972.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.62 : 3,924.06 = 972.22 : x
2. Step 2: Convert to fraction form
   2,615.62/3,924.06 = 972.22/x
3. Step 3: Cross multiply
   2,615.62x = 3,924.06 × 972.22
4. Step 4: Simplify right side
   2,615.62x = 3,815,049.61
5. Step 5: Solve for x
   x = 3,815,049.61/2,615.62
6. Step 6: Final answer
   x = 1,458.56