Finding the Fourth Proportional to 262,131.30, 393,488.55 and 162,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   262,131.30 : 393,488.55 = 162,404.10 : x
2. Step 2: Convert to fraction form
   262,131.30/393,488.55 = 162,404.10/x
3. Step 3: Cross multiply
   262,131.30x = 393,488.55 × 162,404.10
4. Step 4: Simplify right side
   262,131.30x = 63,904,153,823.06
5. Step 5: Solve for x
   x = 63,904,153,823.06/262,131.30
6. Step 6: Final answer
   x = 243,786.81