Finding the Fourth Proportional to 42,773.94, 64,174.86 and 20,589.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,773.94 : 64,174.86 = 20,589.12 : x
2. Step 2: Convert to fraction form
   42,773.94/64,174.86 = 20,589.12/x
3. Step 3: Cross multiply
   42,773.94x = 64,174.86 × 20,589.12
4. Step 4: Simplify right side
   42,773.94x = 1,321,303,893.52
5. Step 5: Solve for x
   x = 1,321,303,893.52/42,773.94
6. Step 6: Final answer
   x = 30,890.39