Finding the Fourth Proportional to 1,669.48, 2,506.38 and 1,054.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.48 : 2,506.38 = 1,054.42 : x
2. Step 2: Convert to fraction form
   1,669.48/2,506.38 = 1,054.42/x
3. Step 3: Cross multiply
   1,669.48x = 2,506.38 × 1,054.42
4. Step 4: Simplify right side
   1,669.48x = 2,642,777.20
5. Step 5: Solve for x
   x = 2,642,777.20/1,669.48
6. Step 6: Final answer
   x = 1,582.99