Finding the Fourth Proportional to 424,022.31, 636,064.61 and 157,782.78

Step by Step Solution

1. Step 1: Write the proportion equation
   424,022.31 : 636,064.61 = 157,782.78 : x
2. Step 2: Convert to fraction form
   424,022.31/636,064.61 = 157,782.78/x
3. Step 3: Cross multiply
   424,022.31x = 636,064.61 × 157,782.78
4. Step 4: Simplify right side
   424,022.31x = 100,360,041,636.50
5. Step 5: Solve for x
   x = 100,360,041,636.50/424,022.31
6. Step 6: Final answer
   x = 236,685.76