Finding the Fourth Proportional to 64,789.65, 89,379.15 and 37,915.53

Step by Step Solution

1. Step 1: Write the proportion equation
   64,789.65 : 89,379.15 = 37,915.53 : x
2. Step 2: Convert to fraction form
   64,789.65/89,379.15 = 37,915.53/x
3. Step 3: Cross multiply
   64,789.65x = 89,379.15 × 37,915.53
4. Step 4: Simplify right side
   64,789.65x = 3,388,857,843.20
5. Step 5: Solve for x
   x = 3,388,857,843.20/64,789.65
6. Step 6: Final answer
   x = 52,305.54