Finding the Fourth Proportional to 14,417.82, 21,483.42 and 12,845.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,417.82 : 21,483.42 = 12,845.76 : x
2. Step 2: Convert to fraction form
   14,417.82/21,483.42 = 12,845.76/x
3. Step 3: Cross multiply
   14,417.82x = 21,483.42 × 12,845.76
4. Step 4: Simplify right side
   14,417.82x = 275,970,857.30
5. Step 5: Solve for x
   x = 275,970,857.30/14,417.82
6. Step 6: Final answer
   x = 19,140.96