Finding the Fourth Proportional to 10,642.12, 15,961.98 and 2,851.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,642.12 : 15,961.98 = 2,851.56 : x
2. Step 2: Convert to fraction form
   10,642.12/15,961.98 = 2,851.56/x
3. Step 3: Cross multiply
   10,642.12x = 15,961.98 × 2,851.56
4. Step 4: Simplify right side
   10,642.12x = 45,516,543.69
5. Step 5: Solve for x
   x = 45,516,543.69/10,642.12
6. Step 6: Final answer
   x = 4,277.02