Finding the Fourth Proportional to 42,777.98, 64,177.90 and 17,809.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,777.98 : 64,177.90 = 17,809.73 : x
2. Step 2: Convert to fraction form
   42,777.98/64,177.90 = 17,809.73/x
3. Step 3: Cross multiply
   42,777.98x = 64,177.90 × 17,809.73
4. Step 4: Simplify right side
   42,777.98x = 1,142,991,046.40
5. Step 5: Solve for x
   x = 1,142,991,046.40/42,777.98
6. Step 6: Final answer
   x = 26,719.15