Finding the Fourth Proportional to 1,776.15, 2,445.86 and 1,216.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.15 : 2,445.86 = 1,216.04 : x
2. Step 2: Convert to fraction form
   1,776.15/2,445.86 = 1,216.04/x
3. Step 3: Cross multiply
   1,776.15x = 2,445.86 × 1,216.04
4. Step 4: Simplify right side
   1,776.15x = 2,974,254.41
5. Step 5: Solve for x
   x = 2,974,254.41/1,776.15
6. Step 6: Final answer
   x = 1,674.55