Finding the Fourth Proportional to 21,510.30, 32,285.98 and 13,206.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,510.30 : 32,285.98 = 13,206.54 : x
2. Step 2: Convert to fraction form
   21,510.30/32,285.98 = 13,206.54/x
3. Step 3: Cross multiply
   21,510.30x = 32,285.98 × 13,206.54
4. Step 4: Simplify right side
   21,510.30x = 426,386,086.31
5. Step 5: Solve for x
   x = 426,386,086.31/21,510.30
6. Step 6: Final answer
   x = 19,822.41