Finding the Fourth Proportional to 89,624.88, 134,465.57 and 42,238.05

Step by Step Solution

1. Step 1: Write the proportion equation
   89,624.88 : 134,465.57 = 42,238.05 : x
2. Step 2: Convert to fraction form
   89,624.88/134,465.57 = 42,238.05/x
3. Step 3: Cross multiply
   89,624.88x = 134,465.57 × 42,238.05
4. Step 4: Simplify right side
   89,624.88x = 5,679,563,257.75
5. Step 5: Solve for x
   x = 5,679,563,257.75/89,624.88
6. Step 6: Final answer
   x = 63,370.39