Finding the Fourth Proportional to 21,776.78, 32,624.06 and 12,865.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,776.78 : 32,624.06 = 12,865.52 : x
2. Step 2: Convert to fraction form
   21,776.78/32,624.06 = 12,865.52/x
3. Step 3: Cross multiply
   21,776.78x = 32,624.06 × 12,865.52
4. Step 4: Simplify right side
   21,776.78x = 419,725,268.96
5. Step 5: Solve for x
   x = 419,725,268.96/21,776.78
6. Step 6: Final answer
   x = 19,273.99