Finding the Fourth Proportional to 2,072.50, 3,107.10 and 976.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.50 : 3,107.10 = 976.60 : x
2. Step 2: Convert to fraction form
   2,072.50/3,107.10 = 976.60/x
3. Step 3: Cross multiply
   2,072.50x = 3,107.10 × 976.60
4. Step 4: Simplify right side
   2,072.50x = 3,034,393.86
5. Step 5: Solve for x
   x = 3,034,393.86/2,072.50
6. Step 6: Final answer
   x = 1,464.12