Finding the Fourth Proportional to 2,128.40, 3,187.02 and 1,472.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.40 : 3,187.02 = 1,472.30 : x
2. Step 2: Convert to fraction form
   2,128.40/3,187.02 = 1,472.30/x
3. Step 3: Cross multiply
   2,128.40x = 3,187.02 × 1,472.30
4. Step 4: Simplify right side
   2,128.40x = 4,692,249.55
5. Step 5: Solve for x
   x = 4,692,249.55/2,128.40
6. Step 6: Final answer
   x = 2,204.59