Finding the Fourth Proportional to 2,920.32, 4,380.51 and 972.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.32 : 4,380.51 = 972.52 : x
2. Step 2: Convert to fraction form
   2,920.32/4,380.51 = 972.52/x
3. Step 3: Cross multiply
   2,920.32x = 4,380.51 × 972.52
4. Step 4: Simplify right side
   2,920.32x = 4,260,106.82
5. Step 5: Solve for x
   x = 4,260,106.82/2,920.32
6. Step 6: Final answer
   x = 1,458.78