Finding the Third Proportional to 59,978.81 and 138,852.56

Step by Step Solution

1. Step 1: Write the proportion equation
   59,978.81 : 138,852.56 = 138,852.56 : x
2. Step 2: Convert to fraction form
   59,978.81/138,852.56 = 138,852.56/x
3. Step 3: Cross multiply
   59,978.81x = 138,852.56 × 138,852.56
4. Step 4: Simplify right side
   59,978.81x = 19,280,034,112.82
5. Step 5: Solve for x
   x = 19,280,034,112.82/59,978.81
6. Step 6: Final answer
   x = 321,447.41