Finding the Fourth Proportional to 1,213.77, 1,819.89 and 483.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213.77 : 1,819.89 = 483.56 : x
2. Step 2: Convert to fraction form
   1,213.77/1,819.89 = 483.56/x
3. Step 3: Cross multiply
   1,213.77x = 1,819.89 × 483.56
4. Step 4: Simplify right side
   1,213.77x = 880,016.91
5. Step 5: Solve for x
   x = 880,016.91/1,213.77
6. Step 6: Final answer
   x = 725.03