Finding the Fourth Proportional to 42,777.88, 64,123.73 and 17,831.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,777.88 : 64,123.73 = 17,831.73 : x
2. Step 2: Convert to fraction form
   42,777.88/64,123.73 = 17,831.73/x
3. Step 3: Cross multiply
   42,777.88x = 64,123.73 × 17,831.73
4. Step 4: Simplify right side
   42,777.88x = 1,143,437,039.95
5. Step 5: Solve for x
   x = 1,143,437,039.95/42,777.88
6. Step 6: Final answer
   x = 26,729.63