Finding the Fourth Proportional to 12,557.53, 17,285.89 and 10,855.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,557.53 : 17,285.89 = 10,855.25 : x
2. Step 2: Convert to fraction form
   12,557.53/17,285.89 = 10,855.25/x
3. Step 3: Cross multiply
   12,557.53x = 17,285.89 × 10,855.25
4. Step 4: Simplify right side
   12,557.53x = 187,642,657.42
5. Step 5: Solve for x
   x = 187,642,657.42/12,557.53
6. Step 6: Final answer
   x = 14,942.64