Finding the Fourth Proportional to 65,208.72, 89,961.16 and 39,694.56

Step by Step Solution

1. Step 1: Write the proportion equation
   65,208.72 : 89,961.16 = 39,694.56 : x
2. Step 2: Convert to fraction form
   65,208.72/89,961.16 = 39,694.56/x
3. Step 3: Cross multiply
   65,208.72x = 89,961.16 × 39,694.56
4. Step 4: Simplify right side
   65,208.72x = 3,570,968,663.29
5. Step 5: Solve for x
   x = 3,570,968,663.29/65,208.72
6. Step 6: Final answer
   x = 54,762.13