Finding the Fourth Proportional to 1,669.60, 2,305.16 and 1,111.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.60 : 2,305.16 = 1,111.16 : x
2. Step 2: Convert to fraction form
   1,669.60/2,305.16 = 1,111.16/x
3. Step 3: Cross multiply
   1,669.60x = 2,305.16 × 1,111.16
4. Step 4: Simplify right side
   1,669.60x = 2,561,401.59
5. Step 5: Solve for x
   x = 2,561,401.59/1,669.60
6. Step 6: Final answer
   x = 1,534.14