Finding the Third Proportional to 289,872 and 433,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,872 : 433,475.50 = 433,475.50 : x
2. Step 2: Convert to fraction form
   289,872/433,475.50 = 433,475.50/x
3. Step 3: Cross multiply
   289,872x = 433,475.50 × 433,475.50
4. Step 4: Simplify right side
   289,872x = 187,901,009,100.25
5. Step 5: Solve for x
   x = 187,901,009,100.25/289,872
6. Step 6: Final answer
   x = 648,220.63