Finding the Fourth Proportional to 31,018.72, 42,806.96 and 17,773.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.72 : 42,806.96 = 17,773.28 : x
2. Step 2: Convert to fraction form
   31,018.72/42,806.96 = 17,773.28/x
3. Step 3: Cross multiply
   31,018.72x = 42,806.96 × 17,773.28
4. Step 4: Simplify right side
   31,018.72x = 760,820,086.03
5. Step 5: Solve for x
   x = 760,820,086.03/31,018.72
6. Step 6: Final answer
   x = 24,527.77