Finding the Fourth Proportional to 404,736.78, 607,134.60 and 155,418.78

Step by Step Solution

1. Step 1: Write the proportion equation
   404,736.78 : 607,134.60 = 155,418.78 : x
2. Step 2: Convert to fraction form
   404,736.78/607,134.60 = 155,418.78/x
3. Step 3: Cross multiply
   404,736.78x = 607,134.60 × 155,418.78
4. Step 4: Simplify right side
   404,736.78x = 94,360,118,827.79
5. Step 5: Solve for x
   x = 94,360,118,827.79/404,736.78
6. Step 6: Final answer
   x = 233,139.47