Finding the Fourth Proportional to 2,518.88, 3,777.12 and 786.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.88 : 3,777.12 = 786.56 : x
2. Step 2: Convert to fraction form
   2,518.88/3,777.12 = 786.56/x
3. Step 3: Cross multiply
   2,518.88x = 3,777.12 × 786.56
4. Step 4: Simplify right side
   2,518.88x = 2,970,931.51
5. Step 5: Solve for x
   x = 2,970,931.51/2,518.88
6. Step 6: Final answer
   x = 1,179.47