Finding the Fourth Proportional to 2,636.06, 3,953.70 and 787.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.06 : 3,953.70 = 787.10 : x
2. Step 2: Convert to fraction form
   2,636.06/3,953.70 = 787.10/x
3. Step 3: Cross multiply
   2,636.06x = 3,953.70 × 787.10
4. Step 4: Simplify right side
   2,636.06x = 3,111,937.50
5. Step 5: Solve for x
   x = 3,111,937.50/2,636.06
6. Step 6: Final answer
   x = 1,180.53