Finding the Fourth Proportional to 20,973.34, 31,470.94 and 8,502.58

Step by Step Solution

1. Step 1: Write the proportion equation
   20,973.34 : 31,470.94 = 8,502.58 : x
2. Step 2: Convert to fraction form
   20,973.34/31,470.94 = 8,502.58/x
3. Step 3: Cross multiply
   20,973.34x = 31,470.94 × 8,502.58
4. Step 4: Simplify right side
   20,973.34x = 267,584,185.03
5. Step 5: Solve for x
   x = 267,584,185.03/20,973.34
6. Step 6: Final answer
   x = 12,758.30