Finding the Fourth Proportional to 238,118.58, 357,084.78 and 86,279.59

Step by Step Solution

1. Step 1: Write the proportion equation
   238,118.58 : 357,084.78 = 86,279.59 : x
2. Step 2: Convert to fraction form
   238,118.58/357,084.78 = 86,279.59/x
3. Step 3: Cross multiply
   238,118.58x = 357,084.78 × 86,279.59
4. Step 4: Simplify right side
   238,118.58x = 30,809,128,413.64
5. Step 5: Solve for x
   x = 30,809,128,413.64/238,118.58
6. Step 6: Final answer
   x = 129,385.65