Finding the Fourth Proportional to 1,348.30, 1,860.90 and 788.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.30 : 1,860.90 = 788.73 : x
2. Step 2: Convert to fraction form
   1,348.30/1,860.90 = 788.73/x
3. Step 3: Cross multiply
   1,348.30x = 1,860.90 × 788.73
4. Step 4: Simplify right side
   1,348.30x = 1,467,743.71
5. Step 5: Solve for x
   x = 1,467,743.71/1,348.30
6. Step 6: Final answer
   x = 1,088.59