Finding the Fourth Proportional to 64,609.98, 89,161.38 and 36,315.72

Step by Step Solution

1. Step 1: Write the proportion equation
   64,609.98 : 89,161.38 = 36,315.72 : x
2. Step 2: Convert to fraction form
   64,609.98/89,161.38 = 36,315.72/x
3. Step 3: Cross multiply
   64,609.98x = 89,161.38 × 36,315.72
4. Step 4: Simplify right side
   64,609.98x = 3,237,959,710.89
5. Step 5: Solve for x
   x = 3,237,959,710.89/64,609.98
6. Step 6: Final answer
   x = 50,115.47