Finding the Third Proportional to 305,926.50 and 656,139

Step by Step Solution

1. Step 1: Write the proportion equation
   305,926.50 : 656,139 = 656,139 : x
2. Step 2: Convert to fraction form
   305,926.50/656,139 = 656,139/x
3. Step 3: Cross multiply
   305,926.50x = 656,139 × 656,139
4. Step 4: Simplify right side
   305,926.50x = 430,518,387,321
5. Step 5: Solve for x
   x = 430,518,387,321/305,926.50
6. Step 6: Final answer
   x = 1,407,260.85