Finding the Fourth Proportional to 1,384.36, 1,911.30 and 912.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.36 : 1,911.30 = 912.52 : x
2. Step 2: Convert to fraction form
   1,384.36/1,911.30 = 912.52/x
3. Step 3: Cross multiply
   1,384.36x = 1,911.30 × 912.52
4. Step 4: Simplify right side
   1,384.36x = 1,744,099.48
5. Step 5: Solve for x
   x = 1,744,099.48/1,384.36
6. Step 6: Final answer
   x = 1,259.86