Finding the Fourth Proportional to 55,300.85, 76,311.88 and 31,424.21

Step by Step Solution

1. Step 1: Write the proportion equation
   55,300.85 : 76,311.88 = 31,424.21 : x
2. Step 2: Convert to fraction form
   55,300.85/76,311.88 = 31,424.21/x
3. Step 3: Cross multiply
   55,300.85x = 76,311.88 × 31,424.21
4. Step 4: Simplify right side
   55,300.85x = 2,398,040,542.61
5. Step 5: Solve for x
   x = 2,398,040,542.61/55,300.85
6. Step 6: Final answer
   x = 43,363.54