Finding the Fourth Proportional to 1,669.31, 2,504.56 and 744.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.31 : 2,504.56 = 744.78 : x
2. Step 2: Convert to fraction form
   1,669.31/2,504.56 = 744.78/x
3. Step 3: Cross multiply
   1,669.31x = 2,504.56 × 744.78
4. Step 4: Simplify right side
   1,669.31x = 1,865,346.20
5. Step 5: Solve for x
   x = 1,865,346.20/1,669.31
6. Step 6: Final answer
   x = 1,117.44