Finding the Third Proportional to 99,897.75 and 212,508

Step by Step Solution

1. Step 1: Write the proportion equation
   99,897.75 : 212,508 = 212,508 : x
2. Step 2: Convert to fraction form
   99,897.75/212,508 = 212,508/x
3. Step 3: Cross multiply
   99,897.75x = 212,508 × 212,508
4. Step 4: Simplify right side
   99,897.75x = 45,159,650,064
5. Step 5: Solve for x
   x = 45,159,650,064/99,897.75
6. Step 6: Final answer
   x = 452,058.73