Finding the Fourth Proportional to 39,546.90, 54,574.72 and 21,641.91

Step by Step Solution

1. Step 1: Write the proportion equation
   39,546.90 : 54,574.72 = 21,641.91 : x
2. Step 2: Convert to fraction form
   39,546.90/54,574.72 = 21,641.91/x
3. Step 3: Cross multiply
   39,546.90x = 54,574.72 × 21,641.91
4. Step 4: Simplify right side
   39,546.90x = 1,181,101,178.52
5. Step 5: Solve for x
   x = 1,181,101,178.52/39,546.90
6. Step 6: Final answer
   x = 29,865.83