Finding the Fourth Proportional to 13,730.38, 18,947.81 and 7,763.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,730.38 : 18,947.81 = 7,763.22 : x
2. Step 2: Convert to fraction form
   13,730.38/18,947.81 = 7,763.22/x
3. Step 3: Cross multiply
   13,730.38x = 18,947.81 × 7,763.22
4. Step 4: Simplify right side
   13,730.38x = 147,096,036.96
5. Step 5: Solve for x
   x = 147,096,036.96/13,730.38
6. Step 6: Final answer
   x = 10,713.18