Finding the Fourth Proportional to 1,345.67, 2,018.53 and 886.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.67 : 2,018.53 = 886.39 : x
2. Step 2: Convert to fraction form
   1,345.67/2,018.53 = 886.39/x
3. Step 3: Cross multiply
   1,345.67x = 2,018.53 × 886.39
4. Step 4: Simplify right side
   1,345.67x = 1,789,200.37
5. Step 5: Solve for x
   x = 1,789,200.37/1,345.67
6. Step 6: Final answer
   x = 1,329.60