Finding the Fourth Proportional to 51,215.99, 70,682.71 and 31,077.98

Step by Step Solution

1. Step 1: Write the proportion equation
   51,215.99 : 70,682.71 = 31,077.98 : x
2. Step 2: Convert to fraction form
   51,215.99/70,682.71 = 31,077.98/x
3. Step 3: Cross multiply
   51,215.99x = 70,682.71 × 31,077.98
4. Step 4: Simplify right side
   51,215.99x = 2,196,675,494.31
5. Step 5: Solve for x
   x = 2,196,675,494.31/51,215.99
6. Step 6: Final answer
   x = 42,890.42