Finding the Fourth Proportional to 1,347.37, 1,859.09 and 787.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.37 : 1,859.09 = 787.89 : x
2. Step 2: Convert to fraction form
   1,347.37/1,859.09 = 787.89/x
3. Step 3: Cross multiply
   1,347.37x = 1,859.09 × 787.89
4. Step 4: Simplify right side
   1,347.37x = 1,464,761.45
5. Step 5: Solve for x
   x = 1,464,761.45/1,347.37
6. Step 6: Final answer
   x = 1,087.13