Finding the Fourth Proportional to 328,231.87, 492,430.83 and 91,574.37

Step by Step Solution

1. Step 1: Write the proportion equation
   328,231.87 : 492,430.83 = 91,574.37 : x
2. Step 2: Convert to fraction form
   328,231.87/492,430.83 = 91,574.37/x
3. Step 3: Cross multiply
   328,231.87x = 492,430.83 × 91,574.37
4. Step 4: Simplify right side
   328,231.87x = 45,094,043,025.83
5. Step 5: Solve for x
   x = 45,094,043,025.83/328,231.87
6. Step 6: Final answer
   x = 137,384.72