Finding the Fourth Proportional to 115,013.72, 158,710.38 and 64,703

Step by Step Solution

1. Step 1: Write the proportion equation
   115,013.72 : 158,710.38 = 64,703 : x
2. Step 2: Convert to fraction form
   115,013.72/158,710.38 = 64,703/x
3. Step 3: Cross multiply
   115,013.72x = 158,710.38 × 64,703
4. Step 4: Simplify right side
   115,013.72x = 10,269,037,717.14
5. Step 5: Solve for x
   x = 10,269,037,717.14/115,013.72
6. Step 6: Final answer
   x = 89,285.33