Finding the Fourth Proportional to 10,922.72, 16,389.48 and 5,072.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,922.72 : 16,389.48 = 5,072.36 : x
2. Step 2: Convert to fraction form
   10,922.72/16,389.48 = 5,072.36/x
3. Step 3: Cross multiply
   10,922.72x = 16,389.48 × 5,072.36
4. Step 4: Simplify right side
   10,922.72x = 83,133,342.77
5. Step 5: Solve for x
   x = 83,133,342.77/10,922.72
6. Step 6: Final answer
   x = 7,611.05