Finding the Fourth Proportional to 47,059.40, 64,945.38 and 31,116.20

Step by Step Solution

1. Step 1: Write the proportion equation
   47,059.40 : 64,945.38 = 31,116.20 : x
2. Step 2: Convert to fraction form
   47,059.40/64,945.38 = 31,116.20/x
3. Step 3: Cross multiply
   47,059.40x = 64,945.38 × 31,116.20
4. Step 4: Simplify right side
   47,059.40x = 2,020,853,433.16
5. Step 5: Solve for x
   x = 2,020,853,433.16/47,059.40
6. Step 6: Final answer
   x = 42,942.61