Finding the Fourth Proportional to 2,636.64, 3,955.53 and 787.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.64 : 3,955.53 = 787.91 : x
2. Step 2: Convert to fraction form
   2,636.64/3,955.53 = 787.91/x
3. Step 3: Cross multiply
   2,636.64x = 3,955.53 × 787.91
4. Step 4: Simplify right side
   2,636.64x = 3,116,581.86
5. Step 5: Solve for x
   x = 3,116,581.86/2,636.64
6. Step 6: Final answer
   x = 1,182.03