Finding the Fourth Proportional to 2,226.72, 3,072.68 and 1,387.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,226.72 : 3,072.68 = 1,387.52 : x
2. Step 2: Convert to fraction form
   2,226.72/3,072.68 = 1,387.52/x
3. Step 3: Cross multiply
   2,226.72x = 3,072.68 × 1,387.52
4. Step 4: Simplify right side
   2,226.72x = 4,263,404.95
5. Step 5: Solve for x
   x = 4,263,404.95/2,226.72
6. Step 6: Final answer
   x = 1,914.66