Finding the Fourth Proportional to 21,520.86, 29,693.57 and 12,563.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,520.86 : 29,693.57 = 12,563.24 : x
2. Step 2: Convert to fraction form
   21,520.86/29,693.57 = 12,563.24/x
3. Step 3: Cross multiply
   21,520.86x = 29,693.57 × 12,563.24
4. Step 4: Simplify right side
   21,520.86x = 373,047,446.37
5. Step 5: Solve for x
   x = 373,047,446.37/21,520.86
6. Step 6: Final answer
   x = 17,334.23