Finding the Fourth Proportional to 9,355.10, 12,909.62 and 5,106.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.10 : 12,909.62 = 5,106.05 : x
2. Step 2: Convert to fraction form
   9,355.10/12,909.62 = 5,106.05/x
3. Step 3: Cross multiply
   9,355.10x = 12,909.62 × 5,106.05
4. Step 4: Simplify right side
   9,355.10x = 65,917,113.42
5. Step 5: Solve for x
   x = 65,917,113.42/9,355.10
6. Step 6: Final answer
   x = 7,046.12