Finding the Third Proportional to 351,378 and 747,771.75

Step by Step Solution

1. Step 1: Write the proportion equation
   351,378 : 747,771.75 = 747,771.75 : x
2. Step 2: Convert to fraction form
   351,378/747,771.75 = 747,771.75/x
3. Step 3: Cross multiply
   351,378x = 747,771.75 × 747,771.75
4. Step 4: Simplify right side
   351,378x = 559,162,590,098.06
5. Step 5: Solve for x
   x = 559,162,590,098.06/351,378
6. Step 6: Final answer
   x = 1,591,342.06