Finding the Fourth Proportional to 117,959.82, 176,764.72 and 86,641.98

Step by Step Solution

1. Step 1: Write the proportion equation
   117,959.82 : 176,764.72 = 86,641.98 : x
2. Step 2: Convert to fraction form
   117,959.82/176,764.72 = 86,641.98/x
3. Step 3: Cross multiply
   117,959.82x = 176,764.72 × 86,641.98
4. Step 4: Simplify right side
   117,959.82x = 15,315,245,334.95
5. Step 5: Solve for x
   x = 15,315,245,334.95/117,959.82
6. Step 6: Final answer
   x = 129,834.42