Finding the Fourth Proportional to 492,210, 738,386.28 and 155,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   492,210 : 738,386.28 = 155,136.72 : x
2. Step 2: Convert to fraction form
   492,210/738,386.28 = 155,136.72/x
3. Step 3: Cross multiply
   492,210x = 738,386.28 × 155,136.72
4. Step 4: Simplify right side
   492,210x = 114,550,825,572.20
5. Step 5: Solve for x
   x = 114,550,825,572.20/492,210
6. Step 6: Final answer
   x = 232,727.55