Finding the Fourth Proportional to 21,963.33, 30,303.06 and 12,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,963.33 : 30,303.06 = 12,402.72 : x
2. Step 2: Convert to fraction form
   21,963.33/30,303.06 = 12,402.72/x
3. Step 3: Cross multiply
   21,963.33x = 30,303.06 × 12,402.72
4. Step 4: Simplify right side
   21,963.33x = 375,840,368.32
5. Step 5: Solve for x
   x = 375,840,368.32/21,963.33
6. Step 6: Final answer
   x = 17,112.18