Finding the Fourth Proportional to 1,385.33, 1,910.91 and 913.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.33 : 1,910.91 = 913.27 : x
2. Step 2: Convert to fraction form
   1,385.33/1,910.91 = 913.27/x
3. Step 3: Cross multiply
   1,385.33x = 1,910.91 × 913.27
4. Step 4: Simplify right side
   1,385.33x = 1,745,172.21
5. Step 5: Solve for x
   x = 1,745,172.21/1,385.33
6. Step 6: Final answer
   x = 1,259.75