Finding the Fourth Proportional to 12,855.52, 17,740.56 and 7,190.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,855.52 : 17,740.56 = 7,190.56 : x
2. Step 2: Convert to fraction form
   12,855.52/17,740.56 = 7,190.56/x
3. Step 3: Cross multiply
   12,855.52x = 17,740.56 × 7,190.56
4. Step 4: Simplify right side
   12,855.52x = 127,564,561.11
5. Step 5: Solve for x
   x = 127,564,561.11/12,855.52
6. Step 6: Final answer
   x = 9,922.94