Finding the Fourth Proportional to 42,316.28, 63,349.78 and 31,272.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,316.28 : 63,349.78 = 31,272.28 : x
2. Step 2: Convert to fraction form
   42,316.28/63,349.78 = 31,272.28/x
3. Step 3: Cross multiply
   42,316.28x = 63,349.78 × 31,272.28
4. Step 4: Simplify right side
   42,316.28x = 1,981,092,058.10
5. Step 5: Solve for x
   x = 1,981,092,058.10/42,316.28
6. Step 6: Final answer
   x = 46,816.31