Finding the Third Proportional to 290,421 and 706,333.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,421 : 706,333.50 = 706,333.50 : x
2. Step 2: Convert to fraction form
   290,421/706,333.50 = 706,333.50/x
3. Step 3: Cross multiply
   290,421x = 706,333.50 × 706,333.50
4. Step 4: Simplify right side
   290,421x = 498,907,013,222.25
5. Step 5: Solve for x
   x = 498,907,013,222.25/290,421
6. Step 6: Final answer
   x = 1,717,875.13