Finding the Fourth Proportional to 20,892.84, 31,341.06 and 7,745.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,892.84 : 31,341.06 = 7,745.31 : x
2. Step 2: Convert to fraction form
   20,892.84/31,341.06 = 7,745.31/x
3. Step 3: Cross multiply
   20,892.84x = 31,341.06 × 7,745.31
4. Step 4: Simplify right side
   20,892.84x = 242,746,225.43
5. Step 5: Solve for x
   x = 242,746,225.43/20,892.84
6. Step 6: Final answer
   x = 11,618.63