Finding the Fourth Proportional to 21,019.86, 31,535.55 and 7,169.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.86 : 31,535.55 = 7,169.94 : x
2. Step 2: Convert to fraction form
   21,019.86/31,535.55 = 7,169.94/x
3. Step 3: Cross multiply
   21,019.86x = 31,535.55 × 7,169.94
4. Step 4: Simplify right side
   21,019.86x = 226,108,001.37
5. Step 5: Solve for x
   x = 226,108,001.37/21,019.86
6. Step 6: Final answer
   x = 10,756.87