Finding the Fourth Proportional to 240,139.93, 360,209.89 and 90,413.81

Step by Step Solution

1. Step 1: Write the proportion equation
   240,139.93 : 360,209.89 = 90,413.81 : x
2. Step 2: Convert to fraction form
   240,139.93/360,209.89 = 90,413.81/x
3. Step 3: Cross multiply
   240,139.93x = 360,209.89 × 90,413.81
4. Step 4: Simplify right side
   240,139.93x = 32,567,948,554.58
5. Step 5: Solve for x
   x = 32,567,948,554.58/240,139.93
6. Step 6: Final answer
   x = 135,620.71