Finding the Fourth Proportional to 7,764.78, 10,713.80 and 7,498.08

Step by Step Solution

1. Step 1: Write the proportion equation
   7,764.78 : 10,713.80 = 7,498.08 : x
2. Step 2: Convert to fraction form
   7,764.78/10,713.80 = 7,498.08/x
3. Step 3: Cross multiply
   7,764.78x = 10,713.80 × 7,498.08
4. Step 4: Simplify right side
   7,764.78x = 80,332,929.50
5. Step 5: Solve for x
   x = 80,332,929.50/7,764.78
6. Step 6: Final answer
   x = 10,345.81