Finding the Fourth Proportional to 38,906.31, 53,690.96 and 22,139.31

Step by Step Solution

1. Step 1: Write the proportion equation
   38,906.31 : 53,690.96 = 22,139.31 : x
2. Step 2: Convert to fraction form
   38,906.31/53,690.96 = 22,139.31/x
3. Step 3: Cross multiply
   38,906.31x = 53,690.96 × 22,139.31
4. Step 4: Simplify right side
   38,906.31x = 1,188,680,696.94
5. Step 5: Solve for x
   x = 1,188,680,696.94/38,906.31
6. Step 6: Final answer
   x = 30,552.39