Finding the Third Proportional to 19,609.31 and 42,064.88

Step by Step Solution

1. Step 1: Write the proportion equation
   19,609.31 : 42,064.88 = 42,064.88 : x
2. Step 2: Convert to fraction form
   19,609.31/42,064.88 = 42,064.88/x
3. Step 3: Cross multiply
   19,609.31x = 42,064.88 × 42,064.88
4. Step 4: Simplify right side
   19,609.31x = 1,769,453,708.77
5. Step 5: Solve for x
   x = 1,769,453,708.77/19,609.31
6. Step 6: Final answer
   x = 90,235.38