Finding the Fourth Proportional to 21,779.46, 30,061.20 and 12,353.46

Step by Step Solution

1. Step 1: Write the proportion equation
   21,779.46 : 30,061.20 = 12,353.46 : x
2. Step 2: Convert to fraction form
   21,779.46/30,061.20 = 12,353.46/x
3. Step 3: Cross multiply
   21,779.46x = 30,061.20 × 12,353.46
4. Step 4: Simplify right side
   21,779.46x = 371,359,831.75
5. Step 5: Solve for x
   x = 371,359,831.75/21,779.46
6. Step 6: Final answer
   x = 17,050.92