Finding the Fourth Proportional to 64,857.89, 89,504.12 and 36,564.05

Step by Step Solution

1. Step 1: Write the proportion equation
   64,857.89 : 89,504.12 = 36,564.05 : x
2. Step 2: Convert to fraction form
   64,857.89/89,504.12 = 36,564.05/x
3. Step 3: Cross multiply
   64,857.89x = 89,504.12 × 36,564.05
4. Step 4: Simplify right side
   64,857.89x = 3,272,633,118.89
5. Step 5: Solve for x
   x = 3,272,633,118.89/64,857.89
6. Step 6: Final answer
   x = 50,458.52