Finding the Fourth Proportional to 117,961.82, 176,767.72 and 86,643.98

Step by Step Solution

1. Step 1: Write the proportion equation
   117,961.82 : 176,767.72 = 86,643.98 : x
2. Step 2: Convert to fraction form
   117,961.82/176,767.72 = 86,643.98/x
3. Step 3: Cross multiply
   117,961.82x = 176,767.72 × 86,643.98
4. Step 4: Simplify right side
   117,961.82x = 15,315,858,796.33
5. Step 5: Solve for x
   x = 15,315,858,796.33/117,961.82
6. Step 6: Final answer
   x = 129,837.42