Finding the Fourth Proportional to 240,139.59, 360,209.37 and 90,413.47

Step by Step Solution

1. Step 1: Write the proportion equation
   240,139.59 : 360,209.37 = 90,413.47 : x
2. Step 2: Convert to fraction form
   240,139.59/360,209.37 = 90,413.47/x
3. Step 3: Cross multiply
   240,139.59x = 360,209.37 × 90,413.47
4. Step 4: Simplify right side
   240,139.59x = 32,567,779,068.21
5. Step 5: Solve for x
   x = 32,567,779,068.21/240,139.59
6. Step 6: Final answer
   x = 135,620.20