Finding the Fourth Proportional to 12,362.98, 18,536.22 and 7,978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,362.98 : 18,536.22 = 7,978.04 : x
2. Step 2: Convert to fraction form
   12,362.98/18,536.22 = 7,978.04/x
3. Step 3: Cross multiply
   12,362.98x = 18,536.22 × 7,978.04
4. Step 4: Simplify right side
   12,362.98x = 147,882,704.61
5. Step 5: Solve for x
   x = 147,882,704.61/12,362.98
6. Step 6: Final answer
   x = 11,961.74