Finding the Third Proportional to 55,540.69 and 74,380.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,540.69 : 74,380.78 = 74,380.78 : x
2. Step 2: Convert to fraction form
   55,540.69/74,380.78 = 74,380.78/x
3. Step 3: Cross multiply
   55,540.69x = 74,380.78 × 74,380.78
4. Step 4: Simplify right side
   55,540.69x = 5,532,500,619.36
5. Step 5: Solve for x
   x = 5,532,500,619.36/55,540.69
6. Step 6: Final answer
   x = 99,611.67