Finding the Fourth Proportional to 21,801.62, 30,085.35 and 12,369.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,801.62 : 30,085.35 = 12,369.98 : x
2. Step 2: Convert to fraction form
   21,801.62/30,085.35 = 12,369.98/x
3. Step 3: Cross multiply
   21,801.62x = 30,085.35 × 12,369.98
4. Step 4: Simplify right side
   21,801.62x = 372,155,177.79
5. Step 5: Solve for x
   x = 372,155,177.79/21,801.62
6. Step 6: Final answer
   x = 17,070.07