Finding the Fourth Proportional to 21,852.65, 30,152.15 and 12,776.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,852.65 : 30,152.15 = 12,776.27 : x
2. Step 2: Convert to fraction form
   21,852.65/30,152.15 = 12,776.27/x
3. Step 3: Cross multiply
   21,852.65x = 30,152.15 × 12,776.27
4. Step 4: Simplify right side
   21,852.65x = 385,231,794.84
5. Step 5: Solve for x
   x = 385,231,794.84/21,852.65
6. Step 6: Final answer
   x = 17,628.61