Finding the Fourth Proportional to 163,839.31, 226,083.83 and 91,236.72

Step by Step Solution

1. Step 1: Write the proportion equation
   163,839.31 : 226,083.83 = 91,236.72 : x
2. Step 2: Convert to fraction form
   163,839.31/226,083.83 = 91,236.72/x
3. Step 3: Cross multiply
   163,839.31x = 226,083.83 × 91,236.72
4. Step 4: Simplify right side
   163,839.31x = 20,627,146,191.91
5. Step 5: Solve for x
   x = 20,627,146,191.91/163,839.31
6. Step 6: Final answer
   x = 125,898.64