Finding the Fourth Proportional to 38,128.50, 57,196.71 and 10,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   38,128.50 : 57,196.71 = 10,426.50 : x
2. Step 2: Convert to fraction form
   38,128.50/57,196.71 = 10,426.50/x
3. Step 3: Cross multiply
   38,128.50x = 57,196.71 × 10,426.50
4. Step 4: Simplify right side
   38,128.50x = 596,361,496.82
5. Step 5: Solve for x
   x = 596,361,496.82/38,128.50
6. Step 6: Final answer
   x = 15,640.83