Finding the Fourth Proportional to 12,062.22, 18,091.89 and 5,138.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,062.22 : 18,091.89 = 5,138.70 : x
2. Step 2: Convert to fraction form
   12,062.22/18,091.89 = 5,138.70/x
3. Step 3: Cross multiply
   12,062.22x = 18,091.89 × 5,138.70
4. Step 4: Simplify right side
   12,062.22x = 92,968,795.14
5. Step 5: Solve for x
   x = 92,968,795.14/12,062.22
6. Step 6: Final answer
   x = 7,707.44