Finding the Fourth Proportional to 3,886.05, 5,364.86 and 2,982.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.05 : 5,364.86 = 2,982.45 : x
2. Step 2: Convert to fraction form
   3,886.05/5,364.86 = 2,982.45/x
3. Step 3: Cross multiply
   3,886.05x = 5,364.86 × 2,982.45
4. Step 4: Simplify right side
   3,886.05x = 16,000,411.79
5. Step 5: Solve for x
   x = 16,000,411.79/3,886.05
6. Step 6: Final answer
   x = 4,117.40