Finding the Fourth Proportional to 65,288.46, 89,511.31 and 64,107.48

Step by Step Solution

1. Step 1: Write the proportion equation
   65,288.46 : 89,511.31 = 64,107.48 : x
2. Step 2: Convert to fraction form
   65,288.46/89,511.31 = 64,107.48/x
3. Step 3: Cross multiply
   65,288.46x = 89,511.31 × 64,107.48
4. Step 4: Simplify right side
   65,288.46x = 5,738,344,931.40
5. Step 5: Solve for x
   x = 5,738,344,931.40/65,288.46
6. Step 6: Final answer
   x = 87,892.17