Finding the Fourth Proportional to 21,972.98, 30,322.06 and 12,413.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,972.98 : 30,322.06 = 12,413.31 : x
2. Step 2: Convert to fraction form
   21,972.98/30,322.06 = 12,413.31/x
3. Step 3: Cross multiply
   21,972.98x = 30,322.06 × 12,413.31
4. Step 4: Simplify right side
   21,972.98x = 376,397,068.55
5. Step 5: Solve for x
   x = 376,397,068.55/21,972.98
6. Step 6: Final answer
   x = 17,130.00