Finding the Fourth Proportional to 42,210.56, 63,178.48 and 31,112.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,210.56 : 63,178.48 = 31,112.80 : x
2. Step 2: Convert to fraction form
   42,210.56/63,178.48 = 31,112.80/x
3. Step 3: Cross multiply
   42,210.56x = 63,178.48 × 31,112.80
4. Step 4: Simplify right side
   42,210.56x = 1,965,659,412.54
5. Step 5: Solve for x
   x = 1,965,659,412.54/42,210.56
6. Step 6: Final answer
   x = 46,567.95