Finding the Fourth Proportional to 64,870.32, 89,518.32 and 36,578.64

Step by Step Solution

1. Step 1: Write the proportion equation
   64,870.32 : 89,518.32 = 36,578.64 : x
2. Step 2: Convert to fraction form
   64,870.32/89,518.32 = 36,578.64/x
3. Step 3: Cross multiply
   64,870.32x = 89,518.32 × 36,578.64
4. Step 4: Simplify right side
   64,870.32x = 3,274,458,400.68
5. Step 5: Solve for x
   x = 3,274,458,400.68/64,870.32
6. Step 6: Final answer
   x = 50,476.99