Finding the Fourth Proportional to 1,385.73, 1,911.06 and 914.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.73 : 1,911.06 = 914.04 : x
2. Step 2: Convert to fraction form
   1,385.73/1,911.06 = 914.04/x
3. Step 3: Cross multiply
   1,385.73x = 1,911.06 × 914.04
4. Step 4: Simplify right side
   1,385.73x = 1,746,785.28
5. Step 5: Solve for x
   x = 1,746,785.28/1,385.73
6. Step 6: Final answer
   x = 1,260.55