Finding the Fourth Proportional to 1,686.74, 2,328.69 and 1,066.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.74 : 2,328.69 = 1,066.58 : x
2. Step 2: Convert to fraction form
   1,686.74/2,328.69 = 1,066.58/x
3. Step 3: Cross multiply
   1,686.74x = 2,328.69 × 1,066.58
4. Step 4: Simplify right side
   1,686.74x = 2,483,734.18
5. Step 5: Solve for x
   x = 2,483,734.18/1,686.74
6. Step 6: Final answer
   x = 1,472.51