Finding the Fourth Proportional to 64,853.67, 89,511.98 and 40,965.15

Step by Step Solution

1. Step 1: Write the proportion equation
   64,853.67 : 89,511.98 = 40,965.15 : x
2. Step 2: Convert to fraction form
   64,853.67/89,511.98 = 40,965.15/x
3. Step 3: Cross multiply
   64,853.67x = 89,511.98 × 40,965.15
4. Step 4: Simplify right side
   64,853.67x = 3,666,871,687.50
5. Step 5: Solve for x
   x = 3,666,871,687.50/64,853.67
6. Step 6: Final answer
   x = 56,540.70