Finding the Third Proportional to 289,146 and 626,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,146 : 626,554.50 = 626,554.50 : x
2. Step 2: Convert to fraction form
   289,146/626,554.50 = 626,554.50/x
3. Step 3: Cross multiply
   289,146x = 626,554.50 × 626,554.50
4. Step 4: Simplify right side
   289,146x = 392,570,541,470.25
5. Step 5: Solve for x
   x = 392,570,541,470.25/289,146
6. Step 6: Final answer
   x = 1,357,689.68