Finding the Fourth Proportional to 39,601.34, 54,648.59 and 21,696.19

Step by Step Solution

1. Step 1: Write the proportion equation
   39,601.34 : 54,648.59 = 21,696.19 : x
2. Step 2: Convert to fraction form
   39,601.34/54,648.59 = 21,696.19/x
3. Step 3: Cross multiply
   39,601.34x = 54,648.59 × 21,696.19
4. Step 4: Simplify right side
   39,601.34x = 1,185,666,191.87
5. Step 5: Solve for x
   x = 1,185,666,191.87/39,601.34
6. Step 6: Final answer
   x = 29,940.05