Finding the Third Proportional to 7,801.31 and 12,278.81

Step by Step Solution

1. Step 1: Write the proportion equation
   7,801.31 : 12,278.81 = 12,278.81 : x
2. Step 2: Convert to fraction form
   7,801.31/12,278.81 = 12,278.81/x
3. Step 3: Cross multiply
   7,801.31x = 12,278.81 × 12,278.81
4. Step 4: Simplify right side
   7,801.31x = 150,769,236.41
5. Step 5: Solve for x
   x = 150,769,236.41/7,801.31
6. Step 6: Final answer
   x = 19,326.14