Finding the Fourth Proportional to 1,348.45, 1,860.17 and 906.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.45 : 1,860.17 = 906.80 : x
2. Step 2: Convert to fraction form
   1,348.45/1,860.17 = 906.80/x
3. Step 3: Cross multiply
   1,348.45x = 1,860.17 × 906.80
4. Step 4: Simplify right side
   1,348.45x = 1,686,788.32
5. Step 5: Solve for x
   x = 1,686,788.32/1,348.45
6. Step 6: Final answer
   x = 1,250.91