Finding the Third Proportional to 428,839.50 and 913,143

Step by Step Solution

1. Step 1: Write the proportion equation
   428,839.50 : 913,143 = 913,143 : x
2. Step 2: Convert to fraction form
   428,839.50/913,143 = 913,143/x
3. Step 3: Cross multiply
   428,839.50x = 913,143 × 913,143
4. Step 4: Simplify right side
   428,839.50x = 833,830,138,449
5. Step 5: Solve for x
   x = 833,830,138,449/428,839.50
6. Step 6: Final answer
   x = 1,944,387.44