Finding the Third Proportional to 359,971.50 and 777,672

Step by Step Solution

1. Step 1: Write the proportion equation
   359,971.50 : 777,672 = 777,672 : x
2. Step 2: Convert to fraction form
   359,971.50/777,672 = 777,672/x
3. Step 3: Cross multiply
   359,971.50x = 777,672 × 777,672
4. Step 4: Simplify right side
   359,971.50x = 604,773,739,584
5. Step 5: Solve for x
   x = 604,773,739,584/359,971.50
6. Step 6: Final answer
   x = 1,680,060.06