Finding the Fourth Proportional to 9,355.75, 12,910.87 and 5,106.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.75 : 12,910.87 = 5,106.79 : x
2. Step 2: Convert to fraction form
   9,355.75/12,910.87 = 5,106.79/x
3. Step 3: Cross multiply
   9,355.75x = 12,910.87 × 5,106.79
4. Step 4: Simplify right side
   9,355.75x = 65,933,076.27
5. Step 5: Solve for x
   x = 65,933,076.27/9,355.75
6. Step 6: Final answer
   x = 7,047.34