Finding the Third Proportional to 272,488.31 and 636,453

Step by Step Solution

1. Step 1: Write the proportion equation
   272,488.31 : 636,453 = 636,453 : x
2. Step 2: Convert to fraction form
   272,488.31/636,453 = 636,453/x
3. Step 3: Cross multiply
   272,488.31x = 636,453 × 636,453
4. Step 4: Simplify right side
   272,488.31x = 405,072,421,209
5. Step 5: Solve for x
   x = 405,072,421,209/272,488.31
6. Step 6: Final answer
   x = 1,486,568.06