Finding the Fourth Proportional to 39,105.38, 53,965.80 and 21,200.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,105.38 : 53,965.80 = 21,200.34 : x
2. Step 2: Convert to fraction form
   39,105.38/53,965.80 = 21,200.34/x
3. Step 3: Cross multiply
   39,105.38x = 53,965.80 × 21,200.34
4. Step 4: Simplify right side
   39,105.38x = 1,144,093,308.37
5. Step 5: Solve for x
   x = 1,144,093,308.37/39,105.38
6. Step 6: Final answer
   x = 29,256.68