Finding the Fourth Proportional to 65,285.65, 89,507.46 and 64,104.67

Step by Step Solution

1. Step 1: Write the proportion equation
   65,285.65 : 89,507.46 = 64,104.67 : x
2. Step 2: Convert to fraction form
   65,285.65/89,507.46 = 64,104.67/x
3. Step 3: Cross multiply
   65,285.65x = 89,507.46 × 64,104.67
4. Step 4: Simplify right side
   65,285.65x = 5,737,846,034.64
5. Step 5: Solve for x
   x = 5,737,846,034.64/65,285.65
6. Step 6: Final answer
   x = 87,888.32