Finding the Fourth Proportional to 1,471.27, 2,191.61 and 1,391.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,471.27 : 2,191.61 = 1,391.69 : x
2. Step 2: Convert to fraction form
   1,471.27/2,191.61 = 1,391.69/x
3. Step 3: Cross multiply
   1,471.27x = 2,191.61 × 1,391.69
4. Step 4: Simplify right side
   1,471.27x = 3,050,041.72
5. Step 5: Solve for x
   x = 3,050,041.72/1,471.27
6. Step 6: Final answer
   x = 2,073.07