Finding the Fourth Proportional to 1,347.27, 1,858.89 and 787.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.27 : 1,858.89 = 787.76 : x
2. Step 2: Convert to fraction form
   1,347.27/1,858.89 = 787.76/x
3. Step 3: Cross multiply
   1,347.27x = 1,858.89 × 787.76
4. Step 4: Simplify right side
   1,347.27x = 1,464,349.89
5. Step 5: Solve for x
   x = 1,464,349.89/1,347.27
6. Step 6: Final answer
   x = 1,086.90