Finding the Fourth Proportional to 39,101.10, 53,959.59 and 21,196.05

Step by Step Solution

1. Step 1: Write the proportion equation
   39,101.10 : 53,959.59 = 21,196.05 : x
2. Step 2: Convert to fraction form
   39,101.10/53,959.59 = 21,196.05/x
3. Step 3: Cross multiply
   39,101.10x = 53,959.59 × 21,196.05
4. Step 4: Simplify right side
   39,101.10x = 1,143,730,167.62
5. Step 5: Solve for x
   x = 1,143,730,167.62/39,101.10
6. Step 6: Final answer
   x = 29,250.59