Finding the Fourth Proportional to 7,870.56, 11,798.55 and 2,672.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.56 : 11,798.55 = 2,672.79 : x
2. Step 2: Convert to fraction form
   7,870.56/11,798.55 = 2,672.79/x
3. Step 3: Cross multiply
   7,870.56x = 11,798.55 × 2,672.79
4. Step 4: Simplify right side
   7,870.56x = 31,535,046.45
5. Step 5: Solve for x
   x = 31,535,046.45/7,870.56
6. Step 6: Final answer
   x = 4,006.71