Finding the Third Proportional to 42,699 and 63,645

Step by Step Solution

1. Step 1: Write the proportion equation
   42,699 : 63,645 = 63,645 : x
2. Step 2: Convert to fraction form
   42,699/63,645 = 63,645/x
3. Step 3: Cross multiply
   42,699x = 63,645 × 63,645
4. Step 4: Simplify right side
   42,699x = 4,050,686,025
5. Step 5: Solve for x
   x = 4,050,686,025/42,699
6. Step 6: Final answer
   x = 94,866.06