Finding the Fourth Proportional to 2,636.45, 3,955.20 and 787.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.45 : 3,955.20 = 787.53 : x
2. Step 2: Convert to fraction form
   2,636.45/3,955.20 = 787.53/x
3. Step 3: Cross multiply
   2,636.45x = 3,955.20 × 787.53
4. Step 4: Simplify right side
   2,636.45x = 3,114,834.72
5. Step 5: Solve for x
   x = 3,114,834.72/2,636.45
6. Step 6: Final answer
   x = 1,181.45