Finding the Fourth Proportional to 64,915.90, 89,631.39 and 41,959.31

Step by Step Solution

1. Step 1: Write the proportion equation
   64,915.90 : 89,631.39 = 41,959.31 : x
2. Step 2: Convert to fraction form
   64,915.90/89,631.39 = 41,959.31/x
3. Step 3: Cross multiply
   64,915.90x = 89,631.39 × 41,959.31
4. Step 4: Simplify right side
   64,915.90x = 3,760,870,620.79
5. Step 5: Solve for x
   x = 3,760,870,620.79/64,915.90
6. Step 6: Final answer
   x = 57,934.51