Finding the Fourth Proportional to 68,448.72, 94,459.38 and 38,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   68,448.72 : 94,459.38 = 38,640.72 : x
2. Step 2: Convert to fraction form
   68,448.72/94,459.38 = 38,640.72/x
3. Step 3: Cross multiply
   68,448.72x = 94,459.38 × 38,640.72
4. Step 4: Simplify right side
   68,448.72x = 3,649,978,453.95
5. Step 5: Solve for x
   x = 3,649,978,453.95/68,448.72
6. Step 6: Final answer
   x = 53,324.28