Finding the Fourth Proportional to 31,320.72, 43,222.96 and 17,173.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,320.72 : 43,222.96 = 17,173.28 : x
2. Step 2: Convert to fraction form
   31,320.72/43,222.96 = 17,173.28/x
3. Step 3: Cross multiply
   31,320.72x = 43,222.96 × 17,173.28
4. Step 4: Simplify right side
   31,320.72x = 742,279,994.51
5. Step 5: Solve for x
   x = 742,279,994.51/31,320.72
6. Step 6: Final answer
   x = 23,699.33