Finding the Third Proportional to 19,465,721.25 and 42,009,163.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,465,721.25 : 42,009,163.50 = 42,009,163.50 : x
2. Step 2: Convert to fraction form
   19,465,721.25/42,009,163.50 = 42,009,163.50/x
3. Step 3: Cross multiply
   19,465,721.25x = 42,009,163.50 × 42,009,163.50
4. Step 4: Simplify right side
   19,465,721.25x = 1,764,769,817,969,732.25
5. Step 5: Solve for x
   x = 1,764,769,817,969,732.25/19,465,721.25
6. Step 6: Final answer
   x = 90,660,386.81