Finding the Fourth Proportional to 1,347.84, 1,859.69 and 787.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.84 : 1,859.69 = 787.99 : x
2. Step 2: Convert to fraction form
   1,347.84/1,859.69 = 787.99/x
3. Step 3: Cross multiply
   1,347.84x = 1,859.69 × 787.99
4. Step 4: Simplify right side
   1,347.84x = 1,465,408.53
5. Step 5: Solve for x
   x = 1,465,408.53/1,347.84
6. Step 6: Final answer
   x = 1,087.23