Finding the Fourth Proportional to 22,813.38, 31,483.70 and 12,742.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,813.38 : 31,483.70 = 12,742.05 : x
2. Step 2: Convert to fraction form
   22,813.38/31,483.70 = 12,742.05/x
3. Step 3: Cross multiply
   22,813.38x = 31,483.70 × 12,742.05
4. Step 4: Simplify right side
   22,813.38x = 401,166,879.59
5. Step 5: Solve for x
   x = 401,166,879.59/22,813.38
6. Step 6: Final answer
   x = 17,584.72