Finding the Fourth Proportional to 18,191.98, 25,091.50 and 12,528.53

Step by Step Solution

1. Step 1: Write the proportion equation
   18,191.98 : 25,091.50 = 12,528.53 : x
2. Step 2: Convert to fraction form
   18,191.98/25,091.50 = 12,528.53/x
3. Step 3: Cross multiply
   18,191.98x = 25,091.50 × 12,528.53
4. Step 4: Simplify right side
   18,191.98x = 314,359,610.50
5. Step 5: Solve for x
   x = 314,359,610.50/18,191.98
6. Step 6: Final answer
   x = 17,280.12