Finding the Fourth Proportional to 12,830.04, 19,275.89 and 12,121.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,830.04 : 19,275.89 = 12,121.97 : x
2. Step 2: Convert to fraction form
   12,830.04/19,275.89 = 12,121.97/x
3. Step 3: Cross multiply
   12,830.04x = 19,275.89 × 12,121.97
4. Step 4: Simplify right side
   12,830.04x = 233,661,603.31
5. Step 5: Solve for x
   x = 233,661,603.31/12,830.04
6. Step 6: Final answer
   x = 18,212.07