Finding the Fourth Proportional to 2,191.30, 3,074.30 and 2,191.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.30 : 3,074.30 = 2,191.30 : x
2. Step 2: Convert to fraction form
   2,191.30/3,074.30 = 2,191.30/x
3. Step 3: Cross multiply
   2,191.30x = 3,074.30 × 2,191.30
4. Step 4: Simplify right side
   2,191.30x = 6,736,713.59
5. Step 5: Solve for x
   x = 6,736,713.59/2,191.30
6. Step 6: Final answer
   x = 3,074.30