Finding the Fourth Proportional to 9,356.18, 12,911.33 and 5,377.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.18 : 12,911.33 = 5,377.19 : x
2. Step 2: Convert to fraction form
   9,356.18/12,911.33 = 5,377.19/x
3. Step 3: Cross multiply
   9,356.18x = 12,911.33 × 5,377.19
4. Step 4: Simplify right side
   9,356.18x = 69,426,623.45
5. Step 5: Solve for x
   x = 69,426,623.45/9,356.18
6. Step 6: Final answer
   x = 7,420.41