Finding the Fourth Proportional to 3,185.61, 4,780.22 and 1,238.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.61 : 4,780.22 = 1,238.01 : x
2. Step 2: Convert to fraction form
   3,185.61/4,780.22 = 1,238.01/x
3. Step 3: Cross multiply
   3,185.61x = 4,780.22 × 1,238.01
4. Step 4: Simplify right side
   3,185.61x = 5,917,953.97
5. Step 5: Solve for x
   x = 5,917,953.97/3,185.61
6. Step 6: Final answer
   x = 1,857.71