Finding the Fourth Proportional to 31,368.16, 43,288.02 and 17,221

Step by Step Solution

1. Step 1: Write the proportion equation
   31,368.16 : 43,288.02 = 17,221 : x
2. Step 2: Convert to fraction form
   31,368.16/43,288.02 = 17,221/x
3. Step 3: Cross multiply
   31,368.16x = 43,288.02 × 17,221
4. Step 4: Simplify right side
   31,368.16x = 745,462,992.42
5. Step 5: Solve for x
   x = 745,462,992.42/31,368.16
6. Step 6: Final answer
   x = 23,764.96