Finding the Fourth Proportional to 31,930.18, 47,897.43 and 12,210.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,930.18 : 47,897.43 = 12,210.82 : x
2. Step 2: Convert to fraction form
   31,930.18/47,897.43 = 12,210.82/x
3. Step 3: Cross multiply
   31,930.18x = 47,897.43 × 12,210.82
4. Step 4: Simplify right side
   31,930.18x = 584,866,896.19
5. Step 5: Solve for x
   x = 584,866,896.19/31,930.18
6. Step 6: Final answer
   x = 18,317.06