Finding the Fourth Proportional to 78,426.78, 117,640.56 and 19,262.46

Step by Step Solution

1. Step 1: Write the proportion equation
   78,426.78 : 117,640.56 = 19,262.46 : x
2. Step 2: Convert to fraction form
   78,426.78/117,640.56 = 19,262.46/x
3. Step 3: Cross multiply
   78,426.78x = 117,640.56 × 19,262.46
4. Step 4: Simplify right side
   78,426.78x = 2,266,046,581.38
5. Step 5: Solve for x
   x = 2,266,046,581.38/78,426.78
6. Step 6: Final answer
   x = 28,893.79