Finding the Third Proportional to 429,145.50 and 630,580.50

Step by Step Solution

1. Step 1: Write the proportion equation
   429,145.50 : 630,580.50 = 630,580.50 : x
2. Step 2: Convert to fraction form
   429,145.50/630,580.50 = 630,580.50/x
3. Step 3: Cross multiply
   429,145.50x = 630,580.50 × 630,580.50
4. Step 4: Simplify right side
   429,145.50x = 397,631,766,980.25
5. Step 5: Solve for x
   x = 397,631,766,980.25/429,145.50
6. Step 6: Final answer
   x = 926,566.32