Finding the Third Proportional to 27,231.19 and 42,790.78

Step by Step Solution

1. Step 1: Write the proportion equation
   27,231.19 : 42,790.78 = 42,790.78 : x
2. Step 2: Convert to fraction form
   27,231.19/42,790.78 = 42,790.78/x
3. Step 3: Cross multiply
   27,231.19x = 42,790.78 × 42,790.78
4. Step 4: Simplify right side
   27,231.19x = 1,831,050,959.99
5. Step 5: Solve for x
   x = 1,831,050,959.99/27,231.19
6. Step 6: Final answer
   x = 67,240.95