Finding the Fourth Proportional to 21,957.08, 30,300.82 and 12,525.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,957.08 : 30,300.82 = 12,525.40 : x
2. Step 2: Convert to fraction form
   21,957.08/30,300.82 = 12,525.40/x
3. Step 3: Cross multiply
   21,957.08x = 30,300.82 × 12,525.40
4. Step 4: Simplify right side
   21,957.08x = 379,529,890.83
5. Step 5: Solve for x
   x = 379,529,890.83/21,957.08
6. Step 6: Final answer
   x = 17,285.08