Finding the Fourth Proportional to 31,938.06, 47,915.61 and 12,218.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,938.06 : 47,915.61 = 12,218.22 : x
2. Step 2: Convert to fraction form
   31,938.06/47,915.61 = 12,218.22/x
3. Step 3: Cross multiply
   31,938.06x = 47,915.61 × 12,218.22
4. Step 4: Simplify right side
   31,938.06x = 585,443,464.41
5. Step 5: Solve for x
   x = 585,443,464.41/31,938.06
6. Step 6: Final answer
   x = 18,330.59