Finding the Fourth Proportional to 115,673.31, 159,628.06 and 64,685.46

Step by Step Solution

1. Step 1: Write the proportion equation
   115,673.31 : 159,628.06 = 64,685.46 : x
2. Step 2: Convert to fraction form
   115,673.31/159,628.06 = 64,685.46/x
3. Step 3: Cross multiply
   115,673.31x = 159,628.06 × 64,685.46
4. Step 4: Simplify right side
   115,673.31x = 10,325,614,490.01
5. Step 5: Solve for x
   x = 10,325,614,490.01/115,673.31
6. Step 6: Final answer
   x = 89,265.32