Finding the Fourth Proportional to 1,682.72, 2,316.48 and 1,387.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,682.72 : 2,316.48 = 1,387.52 : x
2. Step 2: Convert to fraction form
   1,682.72/2,316.48 = 1,387.52/x
3. Step 3: Cross multiply
   1,682.72x = 2,316.48 × 1,387.52
4. Step 4: Simplify right side
   1,682.72x = 3,214,162.33
5. Step 5: Solve for x
   x = 3,214,162.33/1,682.72
6. Step 6: Final answer
   x = 1,910.10