Finding the Fourth Proportional to 31,019.72, 42,808.34 and 17,774.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.72 : 42,808.34 = 17,774.28 : x
2. Step 2: Convert to fraction form
   31,019.72/42,808.34 = 17,774.28/x
3. Step 3: Cross multiply
   31,019.72x = 42,808.34 × 17,774.28
4. Step 4: Simplify right side
   31,019.72x = 760,887,421.50
5. Step 5: Solve for x
   x = 760,887,421.50/31,019.72
6. Step 6: Final answer
   x = 24,529.15