Finding the Fourth Proportional to 1,679.10, 2,316.89 and 933.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.10 : 2,316.89 = 933.05 : x
2. Step 2: Convert to fraction form
   1,679.10/2,316.89 = 933.05/x
3. Step 3: Cross multiply
   1,679.10x = 2,316.89 × 933.05
4. Step 4: Simplify right side
   1,679.10x = 2,161,757.96
5. Step 5: Solve for x
   x = 2,161,757.96/1,679.10
6. Step 6: Final answer
   x = 1,287.45