Finding the Third Proportional to 251,145 and 551,063.63

Step by Step Solution

1. Step 1: Write the proportion equation
   251,145 : 551,063.63 = 551,063.63 : x
2. Step 2: Convert to fraction form
   251,145/551,063.63 = 551,063.63/x
3. Step 3: Cross multiply
   251,145x = 551,063.63 × 551,063.63
4. Step 4: Simplify right side
   251,145x = 303,671,118,798.14
5. Step 5: Solve for x
   x = 303,671,118,798.14/251,145
6. Step 6: Final answer
   x = 1,209,146.58