Finding the Fourth Proportional to 6,613.89, 9,905.71 and 4,298.37

Step by Step Solution

1. Step 1: Write the proportion equation
   6,613.89 : 9,905.71 = 4,298.37 : x
2. Step 2: Convert to fraction form
   6,613.89/9,905.71 = 4,298.37/x
3. Step 3: Cross multiply
   6,613.89x = 9,905.71 × 4,298.37
4. Step 4: Simplify right side
   6,613.89x = 42,578,406.69
5. Step 5: Solve for x
   x = 42,578,406.69/6,613.89
6. Step 6: Final answer
   x = 6,437.73