Finding the Fourth Proportional to 7,662.06, 10,551.78 and 6,899.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,662.06 : 10,551.78 = 6,899.31 : x
2. Step 2: Convert to fraction form
   7,662.06/10,551.78 = 6,899.31/x
3. Step 3: Cross multiply
   7,662.06x = 10,551.78 × 6,899.31
4. Step 4: Simplify right side
   7,662.06x = 72,800,001.27
5. Step 5: Solve for x
   x = 72,800,001.27/7,662.06
6. Step 6: Final answer
   x = 9,501.36