Finding the Fourth Proportional to 86,468.82, 128,843.61 and 77,036.36

Step by Step Solution

1. Step 1: Write the proportion equation
   86,468.82 : 128,843.61 = 77,036.36 : x
2. Step 2: Convert to fraction form
   86,468.82/128,843.61 = 77,036.36/x
3. Step 3: Cross multiply
   86,468.82x = 128,843.61 × 77,036.36
4. Step 4: Simplify right side
   86,468.82x = 9,925,642,272.03
5. Step 5: Solve for x
   x = 9,925,642,272.03/86,468.82
6. Step 6: Final answer
   x = 114,788.69