Finding the Fourth Proportional to 168,103.59, 231,976.16 and 91,621.05

Step by Step Solution

1. Step 1: Write the proportion equation
   168,103.59 : 231,976.16 = 91,621.05 : x
2. Step 2: Convert to fraction form
   168,103.59/231,976.16 = 91,621.05/x
3. Step 3: Cross multiply
   168,103.59x = 231,976.16 × 91,621.05
4. Step 4: Simplify right side
   168,103.59x = 21,253,897,736.18
5. Step 5: Solve for x
   x = 21,253,897,736.18/168,103.59
6. Step 6: Final answer
   x = 126,433.34