Finding the Fourth Proportional to 39,569.34, 54,605.71 and 21,665.51

Step by Step Solution

1. Step 1: Write the proportion equation
   39,569.34 : 54,605.71 = 21,665.51 : x
2. Step 2: Convert to fraction form
   39,569.34/54,605.71 = 21,665.51/x
3. Step 3: Cross multiply
   39,569.34x = 54,605.71 × 21,665.51
4. Step 4: Simplify right side
   39,569.34x = 1,183,060,514.89
5. Step 5: Solve for x
   x = 1,183,060,514.89/39,569.34
6. Step 6: Final answer
   x = 29,898.41