Finding the Fourth Proportional to 89,919.58, 134,906.38 and 42,570.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,919.58 : 134,906.38 = 42,570.76 : x
2. Step 2: Convert to fraction form
   89,919.58/134,906.38 = 42,570.76/x
3. Step 3: Cross multiply
   89,919.58x = 134,906.38 × 42,570.76
4. Step 4: Simplify right side
   89,919.58x = 5,743,067,125.45
5. Step 5: Solve for x
   x = 5,743,067,125.45/89,919.58
6. Step 6: Final answer
   x = 63,868.93