Finding the Fourth Proportional to 22,884, 31,580.40 and 12,948

Step by Step Solution

1. Step 1: Write the proportion equation
   22,884 : 31,580.40 = 12,948 : x
2. Step 2: Convert to fraction form
   22,884/31,580.40 = 12,948/x
3. Step 3: Cross multiply
   22,884x = 31,580.40 × 12,948
4. Step 4: Simplify right side
   22,884x = 408,903,019.20
5. Step 5: Solve for x
   x = 408,903,019.20/22,884
6. Step 6: Final answer
   x = 17,868.51