Finding the Fourth Proportional to 21,784.95, 30,065.58 and 12,352.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,784.95 : 30,065.58 = 12,352.50 : x
2. Step 2: Convert to fraction form
   21,784.95/30,065.58 = 12,352.50/x
3. Step 3: Cross multiply
   21,784.95x = 30,065.58 × 12,352.50
4. Step 4: Simplify right side
   21,784.95x = 371,385,076.95
5. Step 5: Solve for x
   x = 371,385,076.95/21,784.95
6. Step 6: Final answer
   x = 17,047.78