Finding the Fourth Proportional to 103,665.69, 155,456.69 and 40,476.78

Step by Step Solution

1. Step 1: Write the proportion equation
   103,665.69 : 155,456.69 = 40,476.78 : x
2. Step 2: Convert to fraction form
   103,665.69/155,456.69 = 40,476.78/x
3. Step 3: Cross multiply
   103,665.69x = 155,456.69 × 40,476.78
4. Step 4: Simplify right side
   103,665.69x = 6,292,386,038.27
5. Step 5: Solve for x
   x = 6,292,386,038.27/103,665.69
6. Step 6: Final answer
   x = 60,698.83