Finding the Third Proportional to 428,861.50 and 630,819

Step by Step Solution

1. Step 1: Write the proportion equation
   428,861.50 : 630,819 = 630,819 : x
2. Step 2: Convert to fraction form
   428,861.50/630,819 = 630,819/x
3. Step 3: Cross multiply
   428,861.50x = 630,819 × 630,819
4. Step 4: Simplify right side
   428,861.50x = 397,932,610,761
5. Step 5: Solve for x
   x = 397,932,610,761/428,861.50
6. Step 6: Final answer
   x = 927,881.40