Finding the Fourth Proportional to 3,935.58, 5,906.88 and 1,856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,935.58 : 5,906.88 = 1,856.72 : x
2. Step 2: Convert to fraction form
   3,935.58/5,906.88 = 1,856.72/x
3. Step 3: Cross multiply
   3,935.58x = 5,906.88 × 1,856.72
4. Step 4: Simplify right side
   3,935.58x = 10,967,422.23
5. Step 5: Solve for x
   x = 10,967,422.23/3,935.58
6. Step 6: Final answer
   x = 2,786.74