Finding the Fourth Proportional to 2,636.48, 3,953.60 and 787.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.48 : 3,953.60 = 787.04 : x
2. Step 2: Convert to fraction form
   2,636.48/3,953.60 = 787.04/x
3. Step 3: Cross multiply
   2,636.48x = 3,953.60 × 787.04
4. Step 4: Simplify right side
   2,636.48x = 3,111,641.34
5. Step 5: Solve for x
   x = 3,111,641.34/2,636.48
6. Step 6: Final answer
   x = 1,180.23