Finding the Fourth Proportional to 42,140.48, 63,073.56 and 31,042.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,140.48 : 63,073.56 = 31,042.80 : x
2. Step 2: Convert to fraction form
   42,140.48/63,073.56 = 31,042.80/x
3. Step 3: Cross multiply
   42,140.48x = 63,073.56 × 31,042.80
4. Step 4: Simplify right side
   42,140.48x = 1,957,979,908.37
5. Step 5: Solve for x
   x = 1,957,979,908.37/42,140.48
6. Step 6: Final answer
   x = 46,463.16