Finding the Fourth Proportional to 480,146.39, 662,615.39 and 265,300.30

Step by Step Solution

1. Step 1: Write the proportion equation
   480,146.39 : 662,615.39 = 265,300.30 : x
2. Step 2: Convert to fraction form
   480,146.39/662,615.39 = 265,300.30/x
3. Step 3: Cross multiply
   480,146.39x = 662,615.39 × 265,300.30
4. Step 4: Simplify right side
   480,146.39x = 175,792,057,112.04
5. Step 5: Solve for x
   x = 175,792,057,112.04/480,146.39
6. Step 6: Final answer
   x = 366,121.80