Finding the Fourth Proportional to 1,054.74, 1,453.59 and 821.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.74 : 1,453.59 = 821.46 : x
2. Step 2: Convert to fraction form
   1,054.74/1,453.59 = 821.46/x
3. Step 3: Cross multiply
   1,054.74x = 1,453.59 × 821.46
4. Step 4: Simplify right side
   1,054.74x = 1,194,066.04
5. Step 5: Solve for x
   x = 1,194,066.04/1,054.74
6. Step 6: Final answer
   x = 1,132.10