Finding the Fourth Proportional to 115,892.78, 159,918.81 and 64,898.42

Step by Step Solution

1. Step 1: Write the proportion equation
   115,892.78 : 159,918.81 = 64,898.42 : x
2. Step 2: Convert to fraction form
   115,892.78/159,918.81 = 64,898.42/x
3. Step 3: Cross multiply
   115,892.78x = 159,918.81 × 64,898.42
4. Step 4: Simplify right side
   115,892.78x = 10,378,478,097.28
5. Step 5: Solve for x
   x = 10,378,478,097.28/115,892.78
6. Step 6: Final answer
   x = 89,552.41