Finding the Fourth Proportional to 90,809.82, 136,227.42 and 31,636.80

Step by Step Solution

1. Step 1: Write the proportion equation
   90,809.82 : 136,227.42 = 31,636.80 : x
2. Step 2: Convert to fraction form
   90,809.82/136,227.42 = 31,636.80/x
3. Step 3: Cross multiply
   90,809.82x = 136,227.42 × 31,636.80
4. Step 4: Simplify right side
   90,809.82x = 4,309,799,641.06
5. Step 5: Solve for x
   x = 4,309,799,641.06/90,809.82
6. Step 6: Final answer
   x = 47,459.62