Finding the Third Proportional to 19,998.75 and 42,457.03

Step by Step Solution

1. Step 1: Write the proportion equation
   19,998.75 : 42,457.03 = 42,457.03 : x
2. Step 2: Convert to fraction form
   19,998.75/42,457.03 = 42,457.03/x
3. Step 3: Cross multiply
   19,998.75x = 42,457.03 × 42,457.03
4. Step 4: Simplify right side
   19,998.75x = 1,802,599,502.56
5. Step 5: Solve for x
   x = 1,802,599,502.56/19,998.75
6. Step 6: Final answer
   x = 90,135.61