Finding the Fourth Proportional to 64,900.17, 89,563.05 and 39,749.67

Step by Step Solution

1. Step 1: Write the proportion equation
   64,900.17 : 89,563.05 = 39,749.67 : x
2. Step 2: Convert to fraction form
   64,900.17/89,563.05 = 39,749.67/x
3. Step 3: Cross multiply
   64,900.17x = 89,563.05 × 39,749.67
4. Step 4: Simplify right side
   64,900.17x = 3,560,101,681.69
5. Step 5: Solve for x
   x = 3,560,101,681.69/64,900.17
6. Step 6: Final answer
   x = 54,855.04