Finding the Fourth Proportional to 51,185.40, 76,647.06 and 31,404.12

Step by Step Solution

1. Step 1: Write the proportion equation
   51,185.40 : 76,647.06 = 31,404.12 : x
2. Step 2: Convert to fraction form
   51,185.40/76,647.06 = 31,404.12/x
3. Step 3: Cross multiply
   51,185.40x = 76,647.06 × 31,404.12
4. Step 4: Simplify right side
   51,185.40x = 2,407,033,469.89
5. Step 5: Solve for x
   x = 2,407,033,469.89/51,185.40
6. Step 6: Final answer
   x = 47,025.78