Finding the Fourth Proportional to 12,199.07, 18,300.65 and 3,878.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,199.07 : 18,300.65 = 3,878.43 : x
2. Step 2: Convert to fraction form
   12,199.07/18,300.65 = 3,878.43/x
3. Step 3: Cross multiply
   12,199.07x = 18,300.65 × 3,878.43
4. Step 4: Simplify right side
   12,199.07x = 70,977,770.59
5. Step 5: Solve for x
   x = 70,977,770.59/12,199.07
6. Step 6: Final answer
   x = 5,818.30