Finding the Fourth Proportional to 155,074.29, 213,976.89 and 91,424.37

Step by Step Solution

1. Step 1: Write the proportion equation
   155,074.29 : 213,976.89 = 91,424.37 : x
2. Step 2: Convert to fraction form
   155,074.29/213,976.89 = 91,424.37/x
3. Step 3: Cross multiply
   155,074.29x = 213,976.89 × 91,424.37
4. Step 4: Simplify right side
   155,074.29x = 19,562,702,362.81
5. Step 5: Solve for x
   x = 19,562,702,362.81/155,074.29
6. Step 6: Final answer
   x = 126,150.52