Finding the Fourth Proportional to 12,384.15, 18,570.90 and 7,697.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,384.15 : 18,570.90 = 7,697.13 : x
2. Step 2: Convert to fraction form
   12,384.15/18,570.90 = 7,697.13/x
3. Step 3: Cross multiply
   12,384.15x = 18,570.90 × 7,697.13
4. Step 4: Simplify right side
   12,384.15x = 142,942,631.52
5. Step 5: Solve for x
   x = 142,942,631.52/12,384.15
6. Step 6: Final answer
   x = 11,542.39