Finding the Fourth Proportional to 1,436.27, 2,155.34 and 787.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.27 : 2,155.34 = 787.46 : x
2. Step 2: Convert to fraction form
   1,436.27/2,155.34 = 787.46/x
3. Step 3: Cross multiply
   1,436.27x = 2,155.34 × 787.46
4. Step 4: Simplify right side
   1,436.27x = 1,697,235.23
5. Step 5: Solve for x
   x = 1,697,235.23/1,436.27
6. Step 6: Final answer
   x = 1,181.70