Finding the Third Proportional to 19,837.69 and 42,405.19

Step by Step Solution

1. Step 1: Write the proportion equation
   19,837.69 : 42,405.19 = 42,405.19 : x
2. Step 2: Convert to fraction form
   19,837.69/42,405.19 = 42,405.19/x
3. Step 3: Cross multiply
   19,837.69x = 42,405.19 × 42,405.19
4. Step 4: Simplify right side
   19,837.69x = 1,798,199,926.91
5. Step 5: Solve for x
   x = 1,798,199,926.91/19,837.69
6. Step 6: Final answer
   x = 90,645.64