Finding the Fourth Proportional to 90,968.22, 136,390.56 and 31,771.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,968.22 : 136,390.56 = 31,771.50 : x
2. Step 2: Convert to fraction form
   90,968.22/136,390.56 = 31,771.50/x
3. Step 3: Cross multiply
   90,968.22x = 136,390.56 × 31,771.50
4. Step 4: Simplify right side
   90,968.22x = 4,333,332,677.04
5. Step 5: Solve for x
   x = 4,333,332,677.04/90,968.22
6. Step 6: Final answer
   x = 47,635.68