Finding the Fourth Proportional to 10,507.68, 15,761.49 and 3,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,507.68 : 15,761.49 = 3,112.72 : x
2. Step 2: Convert to fraction form
   10,507.68/15,761.49 = 3,112.72/x
3. Step 3: Cross multiply
   10,507.68x = 15,761.49 × 3,112.72
4. Step 4: Simplify right side
   10,507.68x = 49,061,077.42
5. Step 5: Solve for x
   x = 49,061,077.42/10,507.68
6. Step 6: Final answer
   x = 4,669.07