Finding the Fourth Proportional to 8,516.86, 12,775.56 and 2,970.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,516.86 : 12,775.56 = 2,970.79 : x
2. Step 2: Convert to fraction form
   8,516.86/12,775.56 = 2,970.79/x
3. Step 3: Cross multiply
   8,516.86x = 12,775.56 × 2,970.79
4. Step 4: Simplify right side
   8,516.86x = 37,953,505.89
5. Step 5: Solve for x
   x = 37,953,505.89/8,516.86
6. Step 6: Final answer
   x = 4,456.28