Finding the Fourth Proportional to 37,105.84, 55,656.78 and 12,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   37,105.84 : 55,656.78 = 12,142.72 : x
2. Step 2: Convert to fraction form
   37,105.84/55,656.78 = 12,142.72/x
3. Step 3: Cross multiply
   37,105.84x = 55,656.78 × 12,142.72
4. Step 4: Simplify right side
   37,105.84x = 675,824,695.64
5. Step 5: Solve for x
   x = 675,824,695.64/37,105.84
6. Step 6: Final answer
   x = 18,213.43