Finding the Fourth Proportional to 123,685.88, 170,846.70 and 91,486

Step by Step Solution

1. Step 1: Write the proportion equation
   123,685.88 : 170,846.70 = 91,486 : x
2. Step 2: Convert to fraction form
   123,685.88/170,846.70 = 91,486/x
3. Step 3: Cross multiply
   123,685.88x = 170,846.70 × 91,486
4. Step 4: Simplify right side
   123,685.88x = 15,630,081,196.20
5. Step 5: Solve for x
   x = 15,630,081,196.20/123,685.88
6. Step 6: Final answer
   x = 126,369.16