Finding the Fourth Proportional to 1,384.20, 2,086.67 and 1,292.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.20 : 2,086.67 = 1,292.54 : x
2. Step 2: Convert to fraction form
   1,384.20/2,086.67 = 1,292.54/x
3. Step 3: Cross multiply
   1,384.20x = 2,086.67 × 1,292.54
4. Step 4: Simplify right side
   1,384.20x = 2,697,097.98
5. Step 5: Solve for x
   x = 2,697,097.98/1,384.20
6. Step 6: Final answer
   x = 1,948.49