Finding the Fourth Proportional to 63,142.72, 87,133.56 and 39,268.72

Step by Step Solution

1. Step 1: Write the proportion equation
   63,142.72 : 87,133.56 = 39,268.72 : x
2. Step 2: Convert to fraction form
   63,142.72/87,133.56 = 39,268.72/x
3. Step 3: Cross multiply
   63,142.72x = 87,133.56 × 39,268.72
4. Step 4: Simplify right side
   63,142.72x = 3,421,623,370.24
5. Step 5: Solve for x
   x = 3,421,623,370.24/63,142.72
6. Step 6: Final answer
   x = 54,188.72