Finding the Fourth Proportional to 7,818.67, 11,655.59 and 7,698.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,818.67 : 11,655.59 = 7,698.79 : x
2. Step 2: Convert to fraction form
   7,818.67/11,655.59 = 7,698.79/x
3. Step 3: Cross multiply
   7,818.67x = 11,655.59 × 7,698.79
4. Step 4: Simplify right side
   7,818.67x = 89,733,939.74
5. Step 5: Solve for x
   x = 89,733,939.74/7,818.67
6. Step 6: Final answer
   x = 11,476.88