Finding the Fourth Proportional to 1,386.16, 1,910.70 and 1,091.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.16 : 1,910.70 = 1,091.04 : x
2. Step 2: Convert to fraction form
   1,386.16/1,910.70 = 1,091.04/x
3. Step 3: Cross multiply
   1,386.16x = 1,910.70 × 1,091.04
4. Step 4: Simplify right side
   1,386.16x = 2,084,650.13
5. Step 5: Solve for x
   x = 2,084,650.13/1,386.16
6. Step 6: Final answer
   x = 1,503.90