Finding the Fourth Proportional to 1,679.45, 2,516.71 and 845.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.45 : 2,516.71 = 845.37 : x
2. Step 2: Convert to fraction form
   1,679.45/2,516.71 = 845.37/x
3. Step 3: Cross multiply
   1,679.45x = 2,516.71 × 845.37
4. Step 4: Simplify right side
   1,679.45x = 2,127,538.55
5. Step 5: Solve for x
   x = 2,127,538.55/1,679.45
6. Step 6: Final answer
   x = 1,266.81