Finding the Fourth Proportional to 20,931.52, 31,394.58 and 17,443.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,931.52 : 31,394.58 = 17,443.30 : x
2. Step 2: Convert to fraction form
   20,931.52/31,394.58 = 17,443.30/x
3. Step 3: Cross multiply
   20,931.52x = 31,394.58 × 17,443.30
4. Step 4: Simplify right side
   20,931.52x = 547,625,077.31
5. Step 5: Solve for x
   x = 547,625,077.31/20,931.52
6. Step 6: Final answer
   x = 26,162.70