Finding the Fourth Proportional to 68,308.72, 102,474.96 and 20,922.72

Step by Step Solution

1. Step 1: Write the proportion equation
   68,308.72 : 102,474.96 = 20,922.72 : x
2. Step 2: Convert to fraction form
   68,308.72/102,474.96 = 20,922.72/x
3. Step 3: Cross multiply
   68,308.72x = 102,474.96 × 20,922.72
4. Step 4: Simplify right side
   68,308.72x = 2,144,054,895.09
5. Step 5: Solve for x
   x = 2,144,054,895.09/68,308.72
6. Step 6: Final answer
   x = 31,387.72