Finding the Fourth Proportional to 22,679.31, 31,297.82 and 12,470.77

Step by Step Solution

1. Step 1: Write the proportion equation
   22,679.31 : 31,297.82 = 12,470.77 : x
2. Step 2: Convert to fraction form
   22,679.31/31,297.82 = 12,470.77/x
3. Step 3: Cross multiply
   22,679.31x = 31,297.82 × 12,470.77
4. Step 4: Simplify right side
   22,679.31x = 390,307,914.72
5. Step 5: Solve for x
   x = 390,307,914.72/22,679.31
6. Step 6: Final answer
   x = 17,209.87