Finding the Fourth Proportional to 65,222.76, 89,983.56 and 39,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,222.76 : 89,983.56 = 39,718.72 : x
2. Step 2: Convert to fraction form
   65,222.76/89,983.56 = 39,718.72/x
3. Step 3: Cross multiply
   65,222.76x = 89,983.56 × 39,718.72
4. Step 4: Simplify right side
   65,222.76x = 3,574,031,824.24
5. Step 5: Solve for x
   x = 3,574,031,824.24/65,222.76
6. Step 6: Final answer
   x = 54,797.31