Finding the Third Proportional to 590,839 and 916,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   590,839 : 916,606.50 = 916,606.50 : x
2. Step 2: Convert to fraction form
   590,839/916,606.50 = 916,606.50/x
3. Step 3: Cross multiply
   590,839x = 916,606.50 × 916,606.50
4. Step 4: Simplify right side
   590,839x = 840,167,475,842.25
5. Step 5: Solve for x
   x = 840,167,475,842.25/590,839
6. Step 6: Final answer
   x = 1,421,990.55