Finding the Fourth Proportional to 115,786.39, 159,788.08 and 64,798.71

Step by Step Solution

1. Step 1: Write the proportion equation
   115,786.39 : 159,788.08 = 64,798.71 : x
2. Step 2: Convert to fraction form
   115,786.39/159,788.08 = 64,798.71/x
3. Step 3: Cross multiply
   115,786.39x = 159,788.08 × 64,798.71
4. Step 4: Simplify right side
   115,786.39x = 10,354,061,133.38
5. Step 5: Solve for x
   x = 10,354,061,133.38/115,786.39
6. Step 6: Final answer
   x = 89,423.82