Finding the Third Proportional to 27,978.88 and 43,386.66

Step by Step Solution

1. Step 1: Write the proportion equation
   27,978.88 : 43,386.66 = 43,386.66 : x
2. Step 2: Convert to fraction form
   27,978.88/43,386.66 = 43,386.66/x
3. Step 3: Cross multiply
   27,978.88x = 43,386.66 × 43,386.66
4. Step 4: Simplify right side
   27,978.88x = 1,882,401,940.56
5. Step 5: Solve for x
   x = 1,882,401,940.56/27,978.88
6. Step 6: Final answer
   x = 67,279.40