Finding the Fourth Proportional to 6,402.72, 9,591.30 and 3,105.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,402.72 : 9,591.30 = 3,105.81 : x
2. Step 2: Convert to fraction form
   6,402.72/9,591.30 = 3,105.81/x
3. Step 3: Cross multiply
   6,402.72x = 9,591.30 × 3,105.81
4. Step 4: Simplify right side
   6,402.72x = 29,788,755.45
5. Step 5: Solve for x
   x = 29,788,755.45/6,402.72
6. Step 6: Final answer
   x = 4,652.52