Finding the Fourth Proportional to 6,420.84, 9,623.39 and 3,649.83

Step by Step Solution

1. Step 1: Write the proportion equation
   6,420.84 : 9,623.39 = 3,649.83 : x
2. Step 2: Convert to fraction form
   6,420.84/9,623.39 = 3,649.83/x
3. Step 3: Cross multiply
   6,420.84x = 9,623.39 × 3,649.83
4. Step 4: Simplify right side
   6,420.84x = 35,123,719.27
5. Step 5: Solve for x
   x = 35,123,719.27/6,420.84
6. Step 6: Final answer
   x = 5,470.27