Finding the Fourth Proportional to 2,321.12, 3,203.28 and 1,377.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,321.12 : 3,203.28 = 1,377.47 : x
2. Step 2: Convert to fraction form
   2,321.12/3,203.28 = 1,377.47/x
3. Step 3: Cross multiply
   2,321.12x = 3,203.28 × 1,377.47
4. Step 4: Simplify right side
   2,321.12x = 4,412,422.10
5. Step 5: Solve for x
   x = 4,412,422.10/2,321.12
6. Step 6: Final answer
   x = 1,900.99