Finding the Fourth Proportional to 1,488.08, 2,226.72 and 1,213.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.08 : 2,226.72 = 1,213.52 : x
2. Step 2: Convert to fraction form
   1,488.08/2,226.72 = 1,213.52/x
3. Step 3: Cross multiply
   1,488.08x = 2,226.72 × 1,213.52
4. Step 4: Simplify right side
   1,488.08x = 2,702,169.25
5. Step 5: Solve for x
   x = 2,702,169.25/1,488.08
6. Step 6: Final answer
   x = 1,815.88