Finding the Fourth Proportional to 6,989.76, 10,483.20 and 3,091.68

Step by Step Solution

1. Step 1: Write the proportion equation
   6,989.76 : 10,483.20 = 3,091.68 : x
2. Step 2: Convert to fraction form
   6,989.76/10,483.20 = 3,091.68/x
3. Step 3: Cross multiply
   6,989.76x = 10,483.20 × 3,091.68
4. Step 4: Simplify right side
   6,989.76x = 32,410,699.78
5. Step 5: Solve for x
   x = 32,410,699.78/6,989.76
6. Step 6: Final answer
   x = 4,636.88