Finding the Fourth Proportional to 6,384.79, 8,810.38 and 3,994.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,384.79 : 8,810.38 = 3,994.30 : x
2. Step 2: Convert to fraction form
   6,384.79/8,810.38 = 3,994.30/x
3. Step 3: Cross multiply
   6,384.79x = 8,810.38 × 3,994.30
4. Step 4: Simplify right side
   6,384.79x = 35,191,280.86
5. Step 5: Solve for x
   x = 35,191,280.86/6,384.79
6. Step 6: Final answer
   x = 5,511.74