Finding the Fourth Proportional to 42,314.28, 63,346.78 and 31,270.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,314.28 : 63,346.78 = 31,270.28 : x
2. Step 2: Convert to fraction form
   42,314.28/63,346.78 = 31,270.28/x
3. Step 3: Cross multiply
   42,314.28x = 63,346.78 × 31,270.28
4. Step 4: Simplify right side
   42,314.28x = 1,980,871,547.70
5. Step 5: Solve for x
   x = 1,980,871,547.70/42,314.28
6. Step 6: Final answer
   x = 46,813.31