Finding the Third Proportional to 99,507 and 208,237.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,507 : 208,237.50 = 208,237.50 : x
2. Step 2: Convert to fraction form
   99,507/208,237.50 = 208,237.50/x
3. Step 3: Cross multiply
   99,507x = 208,237.50 × 208,237.50
4. Step 4: Simplify right side
   99,507x = 43,362,856,406.25
5. Step 5: Solve for x
   x = 43,362,856,406.25/99,507
6. Step 6: Final answer
   x = 435,776.94