Finding the Fourth Proportional to 1,218.82, 1,828.50 and 670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218.82 : 1,828.50 = 670.72 : x
2. Step 2: Convert to fraction form
   1,218.82/1,828.50 = 670.72/x
3. Step 3: Cross multiply
   1,218.82x = 1,828.50 × 670.72
4. Step 4: Simplify right side
   1,218.82x = 1,226,411.52
5. Step 5: Solve for x
   x = 1,226,411.52/1,218.82
6. Step 6: Final answer
   x = 1,006.23