Finding the Fourth Proportional to 12,087.18, 16,678.71 and 7,050.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.18 : 16,678.71 = 7,050.78 : x
2. Step 2: Convert to fraction form
   12,087.18/16,678.71 = 7,050.78/x
3. Step 3: Cross multiply
   12,087.18x = 16,678.71 × 7,050.78
4. Step 4: Simplify right side
   12,087.18x = 117,597,914.89
5. Step 5: Solve for x
   x = 117,597,914.89/12,087.18
6. Step 6: Final answer
   x = 9,729.14