Finding the Fourth Proportional to 81,097.25, 121,030.71 and 78,997.73

Step by Step Solution

1. Step 1: Write the proportion equation
   81,097.25 : 121,030.71 = 78,997.73 : x
2. Step 2: Convert to fraction form
   81,097.25/121,030.71 = 78,997.73/x
3. Step 3: Cross multiply
   81,097.25x = 121,030.71 × 78,997.73
4. Step 4: Simplify right side
   81,097.25x = 9,561,150,448.89
5. Step 5: Solve for x
   x = 9,561,150,448.89/81,097.25
6. Step 6: Final answer
   x = 117,897.35