Finding the Fourth Proportional to 426,404.72, 638,587.40 and 245,943.08

Step by Step Solution

1. Step 1: Write the proportion equation
   426,404.72 : 638,587.40 = 245,943.08 : x
2. Step 2: Convert to fraction form
   426,404.72/638,587.40 = 245,943.08/x
3. Step 3: Cross multiply
   426,404.72x = 638,587.40 × 245,943.08
4. Step 4: Simplify right side
   426,404.72x = 157,056,153,569.30
5. Step 5: Solve for x
   x = 157,056,153,569.30/426,404.72
6. Step 6: Final answer
   x = 368,326.49