Finding the Fourth Proportional to 89,728.84, 134,595.42 and 42,930.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,728.84 : 134,595.42 = 42,930.28 : x
2. Step 2: Convert to fraction form
   89,728.84/134,595.42 = 42,930.28/x
3. Step 3: Cross multiply
   89,728.84x = 134,595.42 × 42,930.28
4. Step 4: Simplify right side
   89,728.84x = 5,778,219,067.32
5. Step 5: Solve for x
   x = 5,778,219,067.32/89,728.84
6. Step 6: Final answer
   x = 64,396.45