Finding the Fourth Proportional to 154,806.46, 213,591.81 and 91,131.82

Step by Step Solution

1. Step 1: Write the proportion equation
   154,806.46 : 213,591.81 = 91,131.82 : x
2. Step 2: Convert to fraction form
   154,806.46/213,591.81 = 91,131.82/x
3. Step 3: Cross multiply
   154,806.46x = 213,591.81 × 91,131.82
4. Step 4: Simplify right side
   154,806.46x = 19,465,010,382.39
5. Step 5: Solve for x
   x = 19,465,010,382.39/154,806.46
6. Step 6: Final answer
   x = 125,737.71