Finding the Fourth Proportional to 861,162.72, 1,291,796.88 and 262,168.32

Step by Step Solution

1. Step 1: Write the proportion equation
   861,162.72 : 1,291,796.88 = 262,168.32 : x
2. Step 2: Convert to fraction form
   861,162.72/1,291,796.88 = 262,168.32/x
3. Step 3: Cross multiply
   861,162.72x = 1,291,796.88 × 262,168.32
4. Step 4: Simplify right side
   861,162.72x = 338,668,217,810.84
5. Step 5: Solve for x
   x = 338,668,217,810.84/861,162.72
6. Step 6: Final answer
   x = 393,268.55