Finding the Fourth Proportional to 424,196.19, 636,317.83 and 139,875.26

Step by Step Solution

1. Step 1: Write the proportion equation
   424,196.19 : 636,317.83 = 139,875.26 : x
2. Step 2: Convert to fraction form
   424,196.19/636,317.83 = 139,875.26/x
3. Step 3: Cross multiply
   424,196.19x = 636,317.83 × 139,875.26
4. Step 4: Simplify right side
   424,196.19x = 89,005,118,120.34
5. Step 5: Solve for x
   x = 89,005,118,120.34/424,196.19
6. Step 6: Final answer
   x = 209,820.64