Finding the Fourth Proportional to 39,598.40, 54,644.52 and 21,692.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,598.40 : 54,644.52 = 21,692.72 : x
2. Step 2: Convert to fraction form
   39,598.40/54,644.52 = 21,692.72/x
3. Step 3: Cross multiply
   39,598.40x = 54,644.52 × 21,692.72
4. Step 4: Simplify right side
   39,598.40x = 1,185,388,271.89
5. Step 5: Solve for x
   x = 1,185,388,271.89/39,598.40
6. Step 6: Final answer
   x = 29,935.26