Finding the Fourth Proportional to 215,629.32, 323,544.42 and 82,465.72

Step by Step Solution

1. Step 1: Write the proportion equation
   215,629.32 : 323,544.42 = 82,465.72 : x
2. Step 2: Convert to fraction form
   215,629.32/323,544.42 = 82,465.72/x
3. Step 3: Cross multiply
   215,629.32x = 323,544.42 × 82,465.72
4. Step 4: Simplify right side
   215,629.32x = 26,681,323,547.28
5. Step 5: Solve for x
   x = 26,681,323,547.28/215,629.32
6. Step 6: Final answer
   x = 123,736.99