Finding the Fourth Proportional to 1,347.98, 1,860.23 and 788.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.98 : 1,860.23 = 788.32 : x
2. Step 2: Convert to fraction form
   1,347.98/1,860.23 = 788.32/x
3. Step 3: Cross multiply
   1,347.98x = 1,860.23 × 788.32
4. Step 4: Simplify right side
   1,347.98x = 1,466,456.51
5. Step 5: Solve for x
   x = 1,466,456.51/1,347.98
6. Step 6: Final answer
   x = 1,087.89