Finding the Fourth Proportional to 51,259.72, 70,743.36 and 31,111.96

Step by Step Solution

1. Step 1: Write the proportion equation
   51,259.72 : 70,743.36 = 31,111.96 : x
2. Step 2: Convert to fraction form
   51,259.72/70,743.36 = 31,111.96/x
3. Step 3: Cross multiply
   51,259.72x = 70,743.36 × 31,111.96
4. Step 4: Simplify right side
   51,259.72x = 2,200,964,586.59
5. Step 5: Solve for x
   x = 2,200,964,586.59/51,259.72
6. Step 6: Final answer
   x = 42,937.51