Finding the Fourth Proportional to 6,620.94, 9,937.89 and 3,160.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,620.94 : 9,937.89 = 3,160.62 : x
2. Step 2: Convert to fraction form
   6,620.94/9,937.89 = 3,160.62/x
3. Step 3: Cross multiply
   6,620.94x = 9,937.89 × 3,160.62
4. Step 4: Simplify right side
   6,620.94x = 31,409,893.89
5. Step 5: Solve for x
   x = 31,409,893.89/6,620.94
6. Step 6: Final answer
   x = 4,744.02