Finding the Fourth Proportional to 55,493.55, 76,578.84 and 31,618.20

Step by Step Solution

1. Step 1: Write the proportion equation
   55,493.55 : 76,578.84 = 31,618.20 : x
2. Step 2: Convert to fraction form
   55,493.55/76,578.84 = 31,618.20/x
3. Step 3: Cross multiply
   55,493.55x = 76,578.84 × 31,618.20
4. Step 4: Simplify right side
   55,493.55x = 2,421,285,078.89
5. Step 5: Solve for x
   x = 2,421,285,078.89/55,493.55
6. Step 6: Final answer
   x = 43,631.83