Finding the Fourth Proportional to 1,384.96, 1,910.75 and 913.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.96 : 1,910.75 = 913.74 : x
2. Step 2: Convert to fraction form
   1,384.96/1,910.75 = 913.74/x
3. Step 3: Cross multiply
   1,384.96x = 1,910.75 × 913.74
4. Step 4: Simplify right side
   1,384.96x = 1,745,919.15
5. Step 5: Solve for x
   x = 1,745,919.15/1,384.96
6. Step 6: Final answer
   x = 1,260.63