Finding the Fourth Proportional to 1,680.62, 2,518.88 and 1,268.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.62 : 2,518.88 = 1,268.47 : x
2. Step 2: Convert to fraction form
   1,680.62/2,518.88 = 1,268.47/x
3. Step 3: Cross multiply
   1,680.62x = 2,518.88 × 1,268.47
4. Step 4: Simplify right side
   1,680.62x = 3,195,111.07
5. Step 5: Solve for x
   x = 3,195,111.07/1,680.62
6. Step 6: Final answer
   x = 1,901.15