Finding the Fourth Proportional to 20,953.56, 31,438.71 and 7,816.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,953.56 : 31,438.71 = 7,816.98 : x
2. Step 2: Convert to fraction form
   20,953.56/31,438.71 = 7,816.98/x
3. Step 3: Cross multiply
   20,953.56x = 31,438.71 × 7,816.98
4. Step 4: Simplify right side
   20,953.56x = 245,755,767.30
5. Step 5: Solve for x
   x = 245,755,767.30/20,953.56
6. Step 6: Final answer
   x = 11,728.59