Finding the Fourth Proportional to 89,571.88, 134,153.58 and 42,857.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,571.88 : 134,153.58 = 42,857.80 : x
2. Step 2: Convert to fraction form
   89,571.88/134,153.58 = 42,857.80/x
3. Step 3: Cross multiply
   89,571.88x = 134,153.58 × 42,857.80
4. Step 4: Simplify right side
   89,571.88x = 5,749,527,300.92
5. Step 5: Solve for x
   x = 5,749,527,300.92/89,571.88
6. Step 6: Final answer
   x = 64,188.98