Finding the Fourth Proportional to 39,091.35, 53,945.82 and 21,186.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,091.35 : 53,945.82 = 21,186.34 : x
2. Step 2: Convert to fraction form
   39,091.35/53,945.82 = 21,186.34/x
3. Step 3: Cross multiply
   39,091.35x = 53,945.82 × 21,186.34
4. Step 4: Simplify right side
   39,091.35x = 1,142,914,484.10
5. Step 5: Solve for x
   x = 1,142,914,484.10/39,091.35
6. Step 6: Final answer
   x = 29,237.02