Finding the Fourth Proportional to 12,087.18, 16,682.13 and 7,374.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.18 : 16,682.13 = 7,374.21 : x
2. Step 2: Convert to fraction form
   12,087.18/16,682.13 = 7,374.21/x
3. Step 3: Cross multiply
   12,087.18x = 16,682.13 × 7,374.21
4. Step 4: Simplify right side
   12,087.18x = 123,017,529.87
5. Step 5: Solve for x
   x = 123,017,529.87/12,087.18
6. Step 6: Final answer
   x = 10,177.52