Finding the Fourth Proportional to 115,917.27, 159,967.89 and 64,929.57

Step by Step Solution

1. Step 1: Write the proportion equation
   115,917.27 : 159,967.89 = 64,929.57 : x
2. Step 2: Convert to fraction form
   115,917.27/159,967.89 = 64,929.57/x
3. Step 3: Cross multiply
   115,917.27x = 159,967.89 × 64,929.57
4. Step 4: Simplify right side
   115,917.27x = 10,386,646,311.51
5. Step 5: Solve for x
   x = 10,386,646,311.51/115,917.27
6. Step 6: Final answer
   x = 89,603.96