Finding the Fourth Proportional to 89,148.80, 133,569.60 and 42,300.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,148.80 : 133,569.60 = 42,300.80 : x
2. Step 2: Convert to fraction form
   89,148.80/133,569.60 = 42,300.80/x
3. Step 3: Cross multiply
   89,148.80x = 133,569.60 × 42,300.80
4. Step 4: Simplify right side
   89,148.80x = 5,650,100,935.68
5. Step 5: Solve for x
   x = 5,650,100,935.68/89,148.80
6. Step 6: Final answer
   x = 63,378.32