Finding the Fourth Proportional to 7,012.72, 10,520.12 and 2,081.77

Step by Step Solution

1. Step 1: Write the proportion equation
   7,012.72 : 10,520.12 = 2,081.77 : x
2. Step 2: Convert to fraction form
   7,012.72/10,520.12 = 2,081.77/x
3. Step 3: Cross multiply
   7,012.72x = 10,520.12 × 2,081.77
4. Step 4: Simplify right side
   7,012.72x = 21,900,470.21
5. Step 5: Solve for x
   x = 21,900,470.21/7,012.72
6. Step 6: Final answer
   x = 3,122.96