Finding the Third Proportional to 99,507 and 210,247.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,507 : 210,247.50 = 210,247.50 : x
2. Step 2: Convert to fraction form
   99,507/210,247.50 = 210,247.50/x
3. Step 3: Cross multiply
   99,507x = 210,247.50 × 210,247.50
4. Step 4: Simplify right side
   99,507x = 44,204,011,256.25
5. Step 5: Solve for x
   x = 44,204,011,256.25/99,507
6. Step 6: Final answer
   x = 444,230.17