Finding the Third Proportional to 19,478.25 and 42,071.63

Step by Step Solution

1. Step 1: Write the proportion equation
   19,478.25 : 42,071.63 = 42,071.63 : x
2. Step 2: Convert to fraction form
   19,478.25/42,071.63 = 42,071.63/x
3. Step 3: Cross multiply
   19,478.25x = 42,071.63 × 42,071.63
4. Step 4: Simplify right side
   19,478.25x = 1,770,021,630.14
5. Step 5: Solve for x
   x = 1,770,021,630.14/19,478.25
6. Step 6: Final answer
   x = 90,871.70