Finding the Fourth Proportional to 20,460.72, 30,641.79 and 13,866.93

Step by Step Solution

1. Step 1: Write the proportion equation
   20,460.72 : 30,641.79 = 13,866.93 : x
2. Step 2: Convert to fraction form
   20,460.72/30,641.79 = 13,866.93/x
3. Step 3: Cross multiply
   20,460.72x = 30,641.79 × 13,866.93
4. Step 4: Simplify right side
   20,460.72x = 424,907,557.00
5. Step 5: Solve for x
   x = 424,907,557.00/20,460.72
6. Step 6: Final answer
   x = 20,766.99