Finding the Fourth Proportional to 42,939.37, 64,339.02 and 21,850.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,939.37 : 64,339.02 = 21,850.41 : x
2. Step 2: Convert to fraction form
   42,939.37/64,339.02 = 21,850.41/x
3. Step 3: Cross multiply
   42,939.37x = 64,339.02 × 21,850.41
4. Step 4: Simplify right side
   42,939.37x = 1,405,833,966.00
5. Step 5: Solve for x
   x = 1,405,833,966.00/42,939.37
6. Step 6: Final answer
   x = 32,739.98