Finding the Third Proportional to 551,256 and 748,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,256 : 748,129.50 = 748,129.50 : x
2. Step 2: Convert to fraction form
   551,256/748,129.50 = 748,129.50/x
3. Step 3: Cross multiply
   551,256x = 748,129.50 × 748,129.50
4. Step 4: Simplify right side
   551,256x = 559,697,748,770.25
5. Step 5: Solve for x
   x = 559,697,748,770.25/551,256
6. Step 6: Final answer
   x = 1,015,313.66