Finding the Fourth Proportional to 89,496.80, 134,091.60 and 42,648.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,496.80 : 134,091.60 = 42,648.80 : x
2. Step 2: Convert to fraction form
   89,496.80/134,091.60 = 42,648.80/x
3. Step 3: Cross multiply
   89,496.80x = 134,091.60 × 42,648.80
4. Step 4: Simplify right side
   89,496.80x = 5,718,845,830.08
5. Step 5: Solve for x
   x = 5,718,845,830.08/89,496.80
6. Step 6: Final answer
   x = 63,900.00