Finding the Fourth Proportional to 42,315.28, 63,348.28 and 31,271.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,315.28 : 63,348.28 = 31,271.28 : x
2. Step 2: Convert to fraction form
   42,315.28/63,348.28 = 31,271.28/x
3. Step 3: Cross multiply
   42,315.28x = 63,348.28 × 31,271.28
4. Step 4: Simplify right side
   42,315.28x = 1,980,981,801.40
5. Step 5: Solve for x
   x = 1,980,981,801.40/42,315.28
6. Step 6: Final answer
   x = 46,814.81