Finding the Fourth Proportional to 22,487.78, 31,034.14 and 12,930.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,487.78 : 31,034.14 = 12,930.76 : x
2. Step 2: Convert to fraction form
   22,487.78/31,034.14 = 12,930.76/x
3. Step 3: Cross multiply
   22,487.78x = 31,034.14 × 12,930.76
4. Step 4: Simplify right side
   22,487.78x = 401,295,016.15
5. Step 5: Solve for x
   x = 401,295,016.15/22,487.78
6. Step 6: Final answer
   x = 17,845.03