Finding the Third Proportional to 99,290.25 and 212,796

Step by Step Solution

1. Step 1: Write the proportion equation
   99,290.25 : 212,796 = 212,796 : x
2. Step 2: Convert to fraction form
   99,290.25/212,796 = 212,796/x
3. Step 3: Cross multiply
   99,290.25x = 212,796 × 212,796
4. Step 4: Simplify right side
   99,290.25x = 45,282,137,616
5. Step 5: Solve for x
   x = 45,282,137,616/99,290.25
6. Step 6: Final answer
   x = 456,058.25