Finding the Fourth Proportional to 1,488.67, 2,054.39 and 816.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.67 : 2,054.39 = 816.46 : x
2. Step 2: Convert to fraction form
   1,488.67/2,054.39 = 816.46/x
3. Step 3: Cross multiply
   1,488.67x = 2,054.39 × 816.46
4. Step 4: Simplify right side
   1,488.67x = 1,677,321.10
5. Step 5: Solve for x
   x = 1,677,321.10/1,488.67
6. Step 6: Final answer
   x = 1,126.73