Finding the Fourth Proportional to 9,300.80, 12,835.10 and 5,109.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.80 : 12,835.10 = 5,109.05 : x
2. Step 2: Convert to fraction form
   9,300.80/12,835.10 = 5,109.05/x
3. Step 3: Cross multiply
   9,300.80x = 12,835.10 × 5,109.05
4. Step 4: Simplify right side
   9,300.80x = 65,575,212.52
5. Step 5: Solve for x
   x = 65,575,212.52/9,300.80
6. Step 6: Final answer
   x = 7,050.49