Finding the Fourth Proportional to 1,680.56, 2,521.52 and 755.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.56 : 2,521.52 = 755.47 : x
2. Step 2: Convert to fraction form
   1,680.56/2,521.52 = 755.47/x
3. Step 3: Cross multiply
   1,680.56x = 2,521.52 × 755.47
4. Step 4: Simplify right side
   1,680.56x = 1,904,932.71
5. Step 5: Solve for x
   x = 1,904,932.71/1,680.56
6. Step 6: Final answer
   x = 1,133.51