Finding the Fourth Proportional to 1,347.69, 1,859.30 and 787.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.69 : 1,859.30 = 787.98 : x
2. Step 2: Convert to fraction form
   1,347.69/1,859.30 = 787.98/x
3. Step 3: Cross multiply
   1,347.69x = 1,859.30 × 787.98
4. Step 4: Simplify right side
   1,347.69x = 1,465,091.18
5. Step 5: Solve for x
   x = 1,465,091.18/1,347.69
6. Step 6: Final answer
   x = 1,087.11