Finding the Fourth Proportional to 39,050.77, 53,889.98 and 21,145.83

Step by Step Solution

1. Step 1: Write the proportion equation
   39,050.77 : 53,889.98 = 21,145.83 : x
2. Step 2: Convert to fraction form
   39,050.77/53,889.98 = 21,145.83/x
3. Step 3: Cross multiply
   39,050.77x = 53,889.98 × 21,145.83
4. Step 4: Simplify right side
   39,050.77x = 1,139,548,086.33
5. Step 5: Solve for x
   x = 1,139,548,086.33/39,050.77
6. Step 6: Final answer
   x = 29,181.19