Finding the Fourth Proportional to 12,957.67, 19,436.43 and 5,557.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.67 : 19,436.43 = 5,557.33 : x
2. Step 2: Convert to fraction form
   12,957.67/19,436.43 = 5,557.33/x
3. Step 3: Cross multiply
   12,957.67x = 19,436.43 × 5,557.33
4. Step 4: Simplify right side
   12,957.67x = 108,014,655.53
5. Step 5: Solve for x
   x = 108,014,655.53/12,957.67
6. Step 6: Final answer
   x = 8,335.96