Finding the Fourth Proportional to 51,215.54, 70,682.06 and 31,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,215.54 : 70,682.06 = 31,077.50 : x
2. Step 2: Convert to fraction form
   51,215.54/70,682.06 = 31,077.50/x
3. Step 3: Cross multiply
   51,215.54x = 70,682.06 × 31,077.50
4. Step 4: Simplify right side
   51,215.54x = 2,196,621,443.93
5. Step 5: Solve for x
   x = 2,196,621,443.93/51,215.54
6. Step 6: Final answer
   x = 42,889.75