Finding the Fourth Proportional to 10,072.62, 13,900.20 and 5,596.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.62 : 13,900.20 = 5,596.78 : x
2. Step 2: Convert to fraction form
   10,072.62/13,900.20 = 5,596.78/x
3. Step 3: Cross multiply
   10,072.62x = 13,900.20 × 5,596.78
4. Step 4: Simplify right side
   10,072.62x = 77,796,361.36
5. Step 5: Solve for x
   x = 77,796,361.36/10,072.62
6. Step 6: Final answer
   x = 7,723.55