Finding the Fourth Proportional to 2,097.30, 3,145.05 and 1,056.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.30 : 3,145.05 = 1,056.90 : x
2. Step 2: Convert to fraction form
   2,097.30/3,145.05 = 1,056.90/x
3. Step 3: Cross multiply
   2,097.30x = 3,145.05 × 1,056.90
4. Step 4: Simplify right side
   2,097.30x = 3,324,003.35
5. Step 5: Solve for x
   x = 3,324,003.35/2,097.30
6. Step 6: Final answer
   x = 1,584.90