Finding the Third Proportional to 292,392 and 640,624.50

Step by Step Solution

1. Step 1: Write the proportion equation
   292,392 : 640,624.50 = 640,624.50 : x
2. Step 2: Convert to fraction form
   292,392/640,624.50 = 640,624.50/x
3. Step 3: Cross multiply
   292,392x = 640,624.50 × 640,624.50
4. Step 4: Simplify right side
   292,392x = 410,399,750,000.25
5. Step 5: Solve for x
   x = 410,399,750,000.25/292,392
6. Step 6: Final answer
   x = 1,403,594.32