Finding the Third Proportional to 538,731 and 1,178,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   538,731 : 1,178,428.50 = 1,178,428.50 : x
2. Step 2: Convert to fraction form
   538,731/1,178,428.50 = 1,178,428.50/x
3. Step 3: Cross multiply
   538,731x = 1,178,428.50 × 1,178,428.50
4. Step 4: Simplify right side
   538,731x = 1,388,693,729,612.25
5. Step 5: Solve for x
   x = 1,388,693,729,612.25/538,731
6. Step 6: Final answer
   x = 2,577,712.68