Finding the Fourth Proportional to 3,189.06, 4,785.30 and 2,146.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,189.06 : 4,785.30 = 2,146.50 : x
2. Step 2: Convert to fraction form
   3,189.06/4,785.30 = 2,146.50/x
3. Step 3: Cross multiply
   3,189.06x = 4,785.30 × 2,146.50
4. Step 4: Simplify right side
   3,189.06x = 10,271,646.45
5. Step 5: Solve for x
   x = 10,271,646.45/3,189.06
6. Step 6: Final answer
   x = 3,220.90