Finding the Fourth Proportional to 1,776.76, 2,453.86 and 1,216.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.76 : 2,453.86 = 1,216.24 : x
2. Step 2: Convert to fraction form
   1,776.76/2,453.86 = 1,216.24/x
3. Step 3: Cross multiply
   1,776.76x = 2,453.86 × 1,216.24
4. Step 4: Simplify right side
   1,776.76x = 2,984,482.69
5. Step 5: Solve for x
   x = 2,984,482.69/1,776.76
6. Step 6: Final answer
   x = 1,679.73