Finding the Fourth Proportional to 1,816.56, 2,503.94 and 1,226.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.56 : 2,503.94 = 1,226.07 : x
2. Step 2: Convert to fraction form
   1,816.56/2,503.94 = 1,226.07/x
3. Step 3: Cross multiply
   1,816.56x = 2,503.94 × 1,226.07
4. Step 4: Simplify right side
   1,816.56x = 3,070,005.72
5. Step 5: Solve for x
   x = 3,070,005.72/1,816.56
6. Step 6: Final answer
   x = 1,690.01