Finding the Fourth Proportional to 9,377.45, 12,940.72 and 5,185.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.45 : 12,940.72 = 5,185.70 : x
2. Step 2: Convert to fraction form
   9,377.45/12,940.72 = 5,185.70/x
3. Step 3: Cross multiply
   9,377.45x = 12,940.72 × 5,185.70
4. Step 4: Simplify right side
   9,377.45x = 67,106,614.04
5. Step 5: Solve for x
   x = 67,106,614.04/9,377.45
6. Step 6: Final answer
   x = 7,156.17