Finding the Fourth Proportional to 1,347.99, 1,859.60 and 788.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.99 : 1,859.60 = 788.49 : x
2. Step 2: Convert to fraction form
   1,347.99/1,859.60 = 788.49/x
3. Step 3: Cross multiply
   1,347.99x = 1,859.60 × 788.49
4. Step 4: Simplify right side
   1,347.99x = 1,466,272.06
5. Step 5: Solve for x
   x = 1,466,272.06/1,347.99
6. Step 6: Final answer
   x = 1,087.75