Finding the Third Proportional to 289,642.50 and 630,774

Step by Step Solution

1. Step 1: Write the proportion equation
   289,642.50 : 630,774 = 630,774 : x
2. Step 2: Convert to fraction form
   289,642.50/630,774 = 630,774/x
3. Step 3: Cross multiply
   289,642.50x = 630,774 × 630,774
4. Step 4: Simplify right side
   289,642.50x = 397,875,839,076
5. Step 5: Solve for x
   x = 397,875,839,076/289,642.50
6. Step 6: Final answer
   x = 1,373,679.07