Finding the Fourth Proportional to 14,665.78, 21,998.60 and 3,572.43

Step by Step Solution

1. Step 1: Write the proportion equation
   14,665.78 : 21,998.60 = 3,572.43 : x
2. Step 2: Convert to fraction form
   14,665.78/21,998.60 = 3,572.43/x
3. Step 3: Cross multiply
   14,665.78x = 21,998.60 × 3,572.43
4. Step 4: Simplify right side
   14,665.78x = 78,588,458.60
5. Step 5: Solve for x
   x = 78,588,458.60/14,665.78
6. Step 6: Final answer
   x = 5,358.63