Finding the Fourth Proportional to 115,143.78, 158,910.04 and 64,164.80

Step by Step Solution

1. Step 1: Write the proportion equation
   115,143.78 : 158,910.04 = 64,164.80 : x
2. Step 2: Convert to fraction form
   115,143.78/158,910.04 = 64,164.80/x
3. Step 3: Cross multiply
   115,143.78x = 158,910.04 × 64,164.80
4. Step 4: Simplify right side
   115,143.78x = 10,196,430,934.59
5. Step 5: Solve for x
   x = 10,196,430,934.59/115,143.78
6. Step 6: Final answer
   x = 88,553.90