Finding the Fourth Proportional to 7,964.58, 10,997.56 and 7,123.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,964.58 : 10,997.56 = 7,123.80 : x
2. Step 2: Convert to fraction form
   7,964.58/10,997.56 = 7,123.80/x
3. Step 3: Cross multiply
   7,964.58x = 10,997.56 × 7,123.80
4. Step 4: Simplify right side
   7,964.58x = 78,344,417.93
5. Step 5: Solve for x
   x = 78,344,417.93/7,964.58
6. Step 6: Final answer
   x = 9,836.60