Finding the Fourth Proportional to 1,469.27, 2,188.63 and 1,389.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.27 : 2,188.63 = 1,389.69 : x
2. Step 2: Convert to fraction form
   1,469.27/2,188.63 = 1,389.69/x
3. Step 3: Cross multiply
   1,469.27x = 2,188.63 × 1,389.69
4. Step 4: Simplify right side
   1,469.27x = 3,041,506.94
5. Step 5: Solve for x
   x = 3,041,506.94/1,469.27
6. Step 6: Final answer
   x = 2,070.09