Finding the Fourth Proportional to 64,747.03, 89,401.58 and 50,640.07

Step by Step Solution

1. Step 1: Write the proportion equation
   64,747.03 : 89,401.58 = 50,640.07 : x
2. Step 2: Convert to fraction form
   64,747.03/89,401.58 = 50,640.07/x
3. Step 3: Cross multiply
   64,747.03x = 89,401.58 × 50,640.07
4. Step 4: Simplify right side
   64,747.03x = 4,527,302,269.31
5. Step 5: Solve for x
   x = 4,527,302,269.31/64,747.03
6. Step 6: Final answer
   x = 69,922.93