Finding the Fourth Proportional to 89,770.25, 134,640.79 and 42,385.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,770.25 : 134,640.79 = 42,385.25 : x
2. Step 2: Convert to fraction form
   89,770.25/134,640.79 = 42,385.25/x
3. Step 3: Cross multiply
   89,770.25x = 134,640.79 × 42,385.25
4. Step 4: Simplify right side
   89,770.25x = 5,706,783,694.33
5. Step 5: Solve for x
   x = 5,706,783,694.33/89,770.25
6. Step 6: Final answer
   x = 63,570.99