Finding the Fourth Proportional to 1,680.31, 2,521.48 and 1,063.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.31 : 2,521.48 = 1,063.16 : x
2. Step 2: Convert to fraction form
   1,680.31/2,521.48 = 1,063.16/x
3. Step 3: Cross multiply
   1,680.31x = 2,521.48 × 1,063.16
4. Step 4: Simplify right side
   1,680.31x = 2,680,740.32
5. Step 5: Solve for x
   x = 2,680,740.32/1,680.31
6. Step 6: Final answer
   x = 1,595.39