Finding the Third Proportional to 289,158 and 626,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,158 : 626,581.50 = 626,581.50 : x
2. Step 2: Convert to fraction form
   289,158/626,581.50 = 626,581.50/x
3. Step 3: Cross multiply
   289,158x = 626,581.50 × 626,581.50
4. Step 4: Simplify right side
   289,158x = 392,604,376,142.25
5. Step 5: Solve for x
   x = 392,604,376,142.25/289,158
6. Step 6: Final answer
   x = 1,357,750.35