Finding the Fourth Proportional to 2,191.28, 3,263.83 and 2,145.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.28 : 3,263.83 = 2,145.70 : x
2. Step 2: Convert to fraction form
   2,191.28/3,263.83 = 2,145.70/x
3. Step 3: Cross multiply
   2,191.28x = 3,263.83 × 2,145.70
4. Step 4: Simplify right side
   2,191.28x = 7,003,200.03
5. Step 5: Solve for x
   x = 7,003,200.03/2,191.28
6. Step 6: Final answer
   x = 3,195.94