Finding the Fourth Proportional to 22,820.13, 31,487.94 and 12,748.19

Step by Step Solution

1. Step 1: Write the proportion equation
   22,820.13 : 31,487.94 = 12,748.19 : x
2. Step 2: Convert to fraction form
   22,820.13/31,487.94 = 12,748.19/x
3. Step 3: Cross multiply
   22,820.13x = 31,487.94 × 12,748.19
4. Step 4: Simplify right side
   22,820.13x = 401,414,084.39
5. Step 5: Solve for x
   x = 401,414,084.39/22,820.13
6. Step 6: Final answer
   x = 17,590.35