Finding the Fourth Proportional to 6,989.67, 9,645.61 and 3,845.86

Step by Step Solution

1. Step 1: Write the proportion equation
   6,989.67 : 9,645.61 = 3,845.86 : x
2. Step 2: Convert to fraction form
   6,989.67/9,645.61 = 3,845.86/x
3. Step 3: Cross multiply
   6,989.67x = 9,645.61 × 3,845.86
4. Step 4: Simplify right side
   6,989.67x = 37,095,665.67
5. Step 5: Solve for x
   x = 37,095,665.67/6,989.67
6. Step 6: Final answer
   x = 5,307.21