Finding the Fourth Proportional to 50,426.28, 69,607.31 and 39,643.02

Step by Step Solution

1. Step 1: Write the proportion equation
   50,426.28 : 69,607.31 = 39,643.02 : x
2. Step 2: Convert to fraction form
   50,426.28/69,607.31 = 39,643.02/x
3. Step 3: Cross multiply
   50,426.28x = 69,607.31 × 39,643.02
4. Step 4: Simplify right side
   50,426.28x = 2,759,443,982.48
5. Step 5: Solve for x
   x = 2,759,443,982.48/50,426.28
6. Step 6: Final answer
   x = 54,722.34