Finding the Third Proportional to 364,988.50 and 780,418

Step by Step Solution

1. Step 1: Write the proportion equation
   364,988.50 : 780,418 = 780,418 : x
2. Step 2: Convert to fraction form
   364,988.50/780,418 = 780,418/x
3. Step 3: Cross multiply
   364,988.50x = 780,418 × 780,418
4. Step 4: Simplify right side
   364,988.50x = 609,052,254,724
5. Step 5: Solve for x
   x = 609,052,254,724/364,988.50
6. Step 6: Final answer
   x = 1,668,688.89