Finding the Fourth Proportional to 77,377.98, 116,048.50 and 39,918.78

Step by Step Solution

1. Step 1: Write the proportion equation
   77,377.98 : 116,048.50 = 39,918.78 : x
2. Step 2: Convert to fraction form
   77,377.98/116,048.50 = 39,918.78/x
3. Step 3: Cross multiply
   77,377.98x = 116,048.50 × 39,918.78
4. Step 4: Simplify right side
   77,377.98x = 4,632,514,540.83
5. Step 5: Solve for x
   x = 4,632,514,540.83/77,377.98
6. Step 6: Final answer
   x = 59,868.64