Finding the Fourth Proportional to 424,648.86, 636,978.15 and 144,187.98

Step by Step Solution

1. Step 1: Write the proportion equation
   424,648.86 : 636,978.15 = 144,187.98 : x
2. Step 2: Convert to fraction form
   424,648.86/636,978.15 = 144,187.98/x
3. Step 3: Cross multiply
   424,648.86x = 636,978.15 × 144,187.98
4. Step 4: Simplify right side
   424,648.86x = 91,844,592,752.64
5. Step 5: Solve for x
   x = 91,844,592,752.64/424,648.86
6. Step 6: Final answer
   x = 216,283.62