Finding the Fourth Proportional to 1,012.32, 1,395.59 and 787.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.32 : 1,395.59 = 787.55 : x
2. Step 2: Convert to fraction form
   1,012.32/1,395.59 = 787.55/x
3. Step 3: Cross multiply
   1,012.32x = 1,395.59 × 787.55
4. Step 4: Simplify right side
   1,012.32x = 1,099,096.90
5. Step 5: Solve for x
   x = 1,099,096.90/1,012.32
6. Step 6: Final answer
   x = 1,085.72