Finding the Fourth Proportional to 39,564.47, 54,598.88 and 21,659.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,564.47 : 54,598.88 = 21,659.47 : x
2. Step 2: Convert to fraction form
   39,564.47/54,598.88 = 21,659.47/x
3. Step 3: Cross multiply
   39,564.47x = 54,598.88 × 21,659.47
4. Step 4: Simplify right side
   39,564.47x = 1,182,582,695.10
5. Step 5: Solve for x
   x = 1,182,582,695.10/39,564.47
6. Step 6: Final answer
   x = 29,890.02