Finding the Fourth Proportional to 1,348.24, 1,860.72 and 788.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.24 : 1,860.72 = 788.80 : x
2. Step 2: Convert to fraction form
   1,348.24/1,860.72 = 788.80/x
3. Step 3: Cross multiply
   1,348.24x = 1,860.72 × 788.80
4. Step 4: Simplify right side
   1,348.24x = 1,467,735.94
5. Step 5: Solve for x
   x = 1,467,735.94/1,348.24
6. Step 6: Final answer
   x = 1,088.63