Finding the Fourth Proportional to 39,050.29, 53,889.33 and 21,145.33

Step by Step Solution

1. Step 1: Write the proportion equation
   39,050.29 : 53,889.33 = 21,145.33 : x
2. Step 2: Convert to fraction form
   39,050.29/53,889.33 = 21,145.33/x
3. Step 3: Cross multiply
   39,050.29x = 53,889.33 × 21,145.33
4. Step 4: Simplify right side
   39,050.29x = 1,139,507,666.33
5. Step 5: Solve for x
   x = 1,139,507,666.33/39,050.29
6. Step 6: Final answer
   x = 29,180.52