Finding the Third Proportional to 491,445 and 781,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   491,445 : 781,429.50 = 781,429.50 : x
2. Step 2: Convert to fraction form
   491,445/781,429.50 = 781,429.50/x
3. Step 3: Cross multiply
   491,445x = 781,429.50 × 781,429.50
4. Step 4: Simplify right side
   491,445x = 610,632,063,470.25
5. Step 5: Solve for x
   x = 610,632,063,470.25/491,445
6. Step 6: Final answer
   x = 1,242,523.71