Finding the Fourth Proportional to 9,300.96, 12,835.62 and 5,109.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.96 : 12,835.62 = 5,109.21 : x
2. Step 2: Convert to fraction form
   9,300.96/12,835.62 = 5,109.21/x
3. Step 3: Cross multiply
   9,300.96x = 12,835.62 × 5,109.21
4. Step 4: Simplify right side
   9,300.96x = 65,579,878.06
5. Step 5: Solve for x
   x = 65,579,878.06/9,300.96
6. Step 6: Final answer
   x = 7,050.87