Finding the Fourth Proportional to 1,348.34, 1,860.41 and 788.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.34 : 1,860.41 = 788.78 : x
2. Step 2: Convert to fraction form
   1,348.34/1,860.41 = 788.78/x
3. Step 3: Cross multiply
   1,348.34x = 1,860.41 × 788.78
4. Step 4: Simplify right side
   1,348.34x = 1,467,460.82
5. Step 5: Solve for x
   x = 1,467,460.82/1,348.34
6. Step 6: Final answer
   x = 1,088.35