Finding the Third Proportional to 345,876.75 and 743,419.69

Step by Step Solution

1. Step 1: Write the proportion equation
   345,876.75 : 743,419.69 = 743,419.69 : x
2. Step 2: Convert to fraction form
   345,876.75/743,419.69 = 743,419.69/x
3. Step 3: Cross multiply
   345,876.75x = 743,419.69 × 743,419.69
4. Step 4: Simplify right side
   345,876.75x = 552,672,831,762.60
5. Step 5: Solve for x
   x = 552,672,831,762.60/345,876.75
6. Step 6: Final answer
   x = 1,597,889.51