Finding the Fourth Proportional to 10,522.05, 15,782.92 and 3,131.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,522.05 : 15,782.92 = 3,131.51 : x
2. Step 2: Convert to fraction form
   10,522.05/15,782.92 = 3,131.51/x
3. Step 3: Cross multiply
   10,522.05x = 15,782.92 × 3,131.51
4. Step 4: Simplify right side
   10,522.05x = 49,424,285.07
5. Step 5: Solve for x
   x = 49,424,285.07/10,522.05
6. Step 6: Final answer
   x = 4,697.21