Finding the Fourth Proportional to 51,256.04, 70,721.28 and 31,112.42

Step by Step Solution

1. Step 1: Write the proportion equation
   51,256.04 : 70,721.28 = 31,112.42 : x
2. Step 2: Convert to fraction form
   51,256.04/70,721.28 = 31,112.42/x
3. Step 3: Cross multiply
   51,256.04x = 70,721.28 × 31,112.42
4. Step 4: Simplify right side
   51,256.04x = 2,200,309,812.69
5. Step 5: Solve for x
   x = 2,200,309,812.69/51,256.04
6. Step 6: Final answer
   x = 42,927.82