Finding the Fourth Proportional to 1,347.32, 1,859.12 and 787.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.32 : 1,859.12 = 787.75 : x
2. Step 2: Convert to fraction form
   1,347.32/1,859.12 = 787.75/x
3. Step 3: Cross multiply
   1,347.32x = 1,859.12 × 787.75
4. Step 4: Simplify right side
   1,347.32x = 1,464,521.78
5. Step 5: Solve for x
   x = 1,464,521.78/1,347.32
6. Step 6: Final answer
   x = 1,086.99