Finding the Third Proportional to 19,485.56 and 42,388.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,485.56 : 42,388.31 = 42,388.31 : x
2. Step 2: Convert to fraction form
   19,485.56/42,388.31 = 42,388.31/x
3. Step 3: Cross multiply
   19,485.56x = 42,388.31 × 42,388.31
4. Step 4: Simplify right side
   19,485.56x = 1,796,769,036.60
5. Step 5: Solve for x
   x = 1,796,769,036.60/19,485.56
6. Step 6: Final answer
   x = 92,210.27