Finding the Fourth Proportional to 40,645.82, 56,110.41 and 30,578.10

Step by Step Solution

1. Step 1: Write the proportion equation
   40,645.82 : 56,110.41 = 30,578.10 : x
2. Step 2: Convert to fraction form
   40,645.82/56,110.41 = 30,578.10/x
3. Step 3: Cross multiply
   40,645.82x = 56,110.41 × 30,578.10
4. Step 4: Simplify right side
   40,645.82x = 1,715,749,728.02
5. Step 5: Solve for x
   x = 1,715,749,728.02/40,645.82
6. Step 6: Final answer
   x = 42,212.21