Finding the Fourth Proportional to 112,456.54, 155,185.43 and 64,711.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,456.54 : 155,185.43 = 64,711.60 : x
2. Step 2: Convert to fraction form
   112,456.54/155,185.43 = 64,711.60/x
3. Step 3: Cross multiply
   112,456.54x = 155,185.43 × 64,711.60
4. Step 4: Simplify right side
   112,456.54x = 10,042,297,471.99
5. Step 5: Solve for x
   x = 10,042,297,471.99/112,456.54
6. Step 6: Final answer
   x = 89,299.36