Finding the Fourth Proportional to 1,678.93, 2,317.61 and 1,306.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.93 : 2,317.61 = 1,306.94 : x
2. Step 2: Convert to fraction form
   1,678.93/2,317.61 = 1,306.94/x
3. Step 3: Cross multiply
   1,678.93x = 2,317.61 × 1,306.94
4. Step 4: Simplify right side
   1,678.93x = 3,028,968.89
5. Step 5: Solve for x
   x = 3,028,968.89/1,678.93
6. Step 6: Final answer
   x = 1,804.11