Finding the Fourth Proportional to 2,097.10, 3,147.45 and 928.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.10 : 3,147.45 = 928.90 : x
2. Step 2: Convert to fraction form
   2,097.10/3,147.45 = 928.90/x
3. Step 3: Cross multiply
   2,097.10x = 3,147.45 × 928.90
4. Step 4: Simplify right side
   2,097.10x = 2,923,666.31
5. Step 5: Solve for x
   x = 2,923,666.31/2,097.10
6. Step 6: Final answer
   x = 1,394.15