Finding the Fourth Proportional to 89,790.31, 134,712.87 and 42,441.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,790.31 : 134,712.87 = 42,441.76 : x
2. Step 2: Convert to fraction form
   89,790.31/134,712.87 = 42,441.76/x
3. Step 3: Cross multiply
   89,790.31x = 134,712.87 × 42,441.76
4. Step 4: Simplify right side
   89,790.31x = 5,717,451,297.45
5. Step 5: Solve for x
   x = 5,717,451,297.45/89,790.31
6. Step 6: Final answer
   x = 63,675.59