Finding the Fourth Proportional to 21,779.84, 30,061.52 and 12,353.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,779.84 : 30,061.52 = 12,353.92 : x
2. Step 2: Convert to fraction form
   21,779.84/30,061.52 = 12,353.92/x
3. Step 3: Cross multiply
   21,779.84x = 30,061.52 × 12,353.92
4. Step 4: Simplify right side
   21,779.84x = 371,377,613.16
5. Step 5: Solve for x
   x = 371,377,613.16/21,779.84
6. Step 6: Final answer
   x = 17,051.44