Finding the Fourth Proportional to 21,210.73, 29,274.41 and 12,263.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,210.73 : 29,274.41 = 12,263.42 : x
2. Step 2: Convert to fraction form
   21,210.73/29,274.41 = 12,263.42/x
3. Step 3: Cross multiply
   21,210.73x = 29,274.41 × 12,263.42
4. Step 4: Simplify right side
   21,210.73x = 359,004,488.93
5. Step 5: Solve for x
   x = 359,004,488.93/21,210.73
6. Step 6: Final answer
   x = 16,925.61