Finding the Third Proportional to 103,987 and 212,901.75

Step by Step Solution

1. Step 1: Write the proportion equation
   103,987 : 212,901.75 = 212,901.75 : x
2. Step 2: Convert to fraction form
   103,987/212,901.75 = 212,901.75/x
3. Step 3: Cross multiply
   103,987x = 212,901.75 × 212,901.75
4. Step 4: Simplify right side
   103,987x = 45,327,155,153.06
5. Step 5: Solve for x
   x = 45,327,155,153.06/103,987
6. Step 6: Final answer
   x = 435,892.52