Finding the Third Proportional to 42,804.75 and 66,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,804.75 : 66,538.50 = 66,538.50 : x
2. Step 2: Convert to fraction form
   42,804.75/66,538.50 = 66,538.50/x
3. Step 3: Cross multiply
   42,804.75x = 66,538.50 × 66,538.50
4. Step 4: Simplify right side
   42,804.75x = 4,427,371,982.25
5. Step 5: Solve for x
   x = 4,427,371,982.25/42,804.75
6. Step 6: Final answer
   x = 103,431.79