Finding the Fourth Proportional to 89,578.88, 134,164.08 and 42,864.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,578.88 : 134,164.08 = 42,864.80 : x
2. Step 2: Convert to fraction form
   89,578.88/134,164.08 = 42,864.80/x
3. Step 3: Cross multiply
   89,578.88x = 134,164.08 × 42,864.80
4. Step 4: Simplify right side
   89,578.88x = 5,750,916,456.38
5. Step 5: Solve for x
   x = 5,750,916,456.38/89,578.88
6. Step 6: Final answer
   x = 64,199.47