Finding the Fourth Proportional to 37,090.89, 55,639.76 and 12,131.09

Step by Step Solution

1. Step 1: Write the proportion equation
   37,090.89 : 55,639.76 = 12,131.09 : x
2. Step 2: Convert to fraction form
   37,090.89/55,639.76 = 12,131.09/x
3. Step 3: Cross multiply
   37,090.89x = 55,639.76 × 12,131.09
4. Step 4: Simplify right side
   37,090.89x = 674,970,597.28
5. Step 5: Solve for x
   x = 674,970,597.28/37,090.89
6. Step 6: Final answer
   x = 18,197.75