Finding the Fourth Proportional to 1,910.04, 2,636.73 and 1,390.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.04 : 2,636.73 = 1,390.02 : x
2. Step 2: Convert to fraction form
   1,910.04/2,636.73 = 1,390.02/x
3. Step 3: Cross multiply
   1,910.04x = 2,636.73 × 1,390.02
4. Step 4: Simplify right side
   1,910.04x = 3,665,107.43
5. Step 5: Solve for x
   x = 3,665,107.43/1,910.04
6. Step 6: Final answer
   x = 1,918.86