Finding the Third Proportional to 428,559 and 921,613.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,559 : 921,613.50 = 921,613.50 : x
2. Step 2: Convert to fraction form
   428,559/921,613.50 = 921,613.50/x
3. Step 3: Cross multiply
   428,559x = 921,613.50 × 921,613.50
4. Step 4: Simplify right side
   428,559x = 849,371,443,382.25
5. Step 5: Solve for x
   x = 849,371,443,382.25/428,559
6. Step 6: Final answer
   x = 1,981,924.18