Finding the Fourth Proportional to 39,087.72, 53,940.83 and 21,182.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,087.72 : 53,940.83 = 21,182.72 : x
2. Step 2: Convert to fraction form
   39,087.72/53,940.83 = 21,182.72/x
3. Step 3: Cross multiply
   39,087.72x = 53,940.83 × 21,182.72
4. Step 4: Simplify right side
   39,087.72x = 1,142,613,122.84
5. Step 5: Solve for x
   x = 1,142,613,122.84/39,087.72
6. Step 6: Final answer
   x = 29,232.02