Finding the Fourth Proportional to 64,507.68, 89,020.71 and 36,213.57

Step by Step Solution

1. Step 1: Write the proportion equation
   64,507.68 : 89,020.71 = 36,213.57 : x
2. Step 2: Convert to fraction form
   64,507.68/89,020.71 = 36,213.57/x
3. Step 3: Cross multiply
   64,507.68x = 89,020.71 × 36,213.57
4. Step 4: Simplify right side
   64,507.68x = 3,223,757,713.03
5. Step 5: Solve for x
   x = 3,223,757,713.03/64,507.68
6. Step 6: Final answer
   x = 49,974.79