Finding the Fourth Proportional to 31,320.10, 43,221.54 and 17,173

Step by Step Solution

1. Step 1: Write the proportion equation
   31,320.10 : 43,221.54 = 17,173 : x
2. Step 2: Convert to fraction form
   31,320.10/43,221.54 = 17,173/x
3. Step 3: Cross multiply
   31,320.10x = 43,221.54 × 17,173
4. Step 4: Simplify right side
   31,320.10x = 742,243,506.42
5. Step 5: Solve for x
   x = 742,243,506.42/31,320.10
6. Step 6: Final answer
   x = 23,698.63