Finding the Fourth Proportional to 81,976.01, 113,642.78 and 77,485.82

Step by Step Solution

1. Step 1: Write the proportion equation
   81,976.01 : 113,642.78 = 77,485.82 : x
2. Step 2: Convert to fraction form
   81,976.01/113,642.78 = 77,485.82/x
3. Step 3: Cross multiply
   81,976.01x = 113,642.78 × 77,485.82
4. Step 4: Simplify right side
   81,976.01x = 8,805,703,039.74
5. Step 5: Solve for x
   x = 8,805,703,039.74/81,976.01
6. Step 6: Final answer
   x = 107,418.06