Finding the Third Proportional to 397,791 and 859,126.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,791 : 859,126.50 = 859,126.50 : x
2. Step 2: Convert to fraction form
   397,791/859,126.50 = 859,126.50/x
3. Step 3: Cross multiply
   397,791x = 859,126.50 × 859,126.50
4. Step 4: Simplify right side
   397,791x = 738,098,343,002.25
5. Step 5: Solve for x
   x = 738,098,343,002.25/397,791
6. Step 6: Final answer
   x = 1,855,492.82