Finding the Fourth Proportional to 1,322.49, 1,820.88 and 1,006.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.49 : 1,820.88 = 1,006.74 : x
2. Step 2: Convert to fraction form
   1,322.49/1,820.88 = 1,006.74/x
3. Step 3: Cross multiply
   1,322.49x = 1,820.88 × 1,006.74
4. Step 4: Simplify right side
   1,322.49x = 1,833,155.78
5. Step 5: Solve for x
   x = 1,833,155.78/1,322.49
6. Step 6: Final answer
   x = 1,386.14