Finding the Fourth Proportional to 37,121.69, 55,640.72 and 18,415.15

Step by Step Solution

1. Step 1: Write the proportion equation
   37,121.69 : 55,640.72 = 18,415.15 : x
2. Step 2: Convert to fraction form
   37,121.69/55,640.72 = 18,415.15/x
3. Step 3: Cross multiply
   37,121.69x = 55,640.72 × 18,415.15
4. Step 4: Simplify right side
   37,121.69x = 1,024,632,111.84
5. Step 5: Solve for x
   x = 1,024,632,111.84/37,121.69
6. Step 6: Final answer
   x = 27,601.98