Finding the Fourth Proportional to 3,899.88, 5,819.64 and 3,484.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.88 : 5,819.64 = 3,484.50 : x
2. Step 2: Convert to fraction form
   3,899.88/5,819.64 = 3,484.50/x
3. Step 3: Cross multiply
   3,899.88x = 5,819.64 × 3,484.50
4. Step 4: Simplify right side
   3,899.88x = 20,278,535.58
5. Step 5: Solve for x
   x = 20,278,535.58/3,899.88
6. Step 6: Final answer
   x = 5,199.78