Finding the Fourth Proportional to 89,612.48, 134,447.88 and 42,869

Step by Step Solution

1. Step 1: Write the proportion equation
   89,612.48 : 134,447.88 = 42,869 : x
2. Step 2: Convert to fraction form
   89,612.48/134,447.88 = 42,869/x
3. Step 3: Cross multiply
   89,612.48x = 134,447.88 × 42,869
4. Step 4: Simplify right side
   89,612.48x = 5,763,646,167.72
5. Step 5: Solve for x
   x = 5,763,646,167.72/89,612.48
6. Step 6: Final answer
   x = 64,317.45