Finding the Third Proportional to 360,321.75 and 784,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   360,321.75 : 784,066.50 = 784,066.50 : x
2. Step 2: Convert to fraction form
   360,321.75/784,066.50 = 784,066.50/x
3. Step 3: Cross multiply
   360,321.75x = 784,066.50 × 784,066.50
4. Step 4: Simplify right side
   360,321.75x = 614,760,276,422.25
5. Step 5: Solve for x
   x = 614,760,276,422.25/360,321.75
6. Step 6: Final answer
   x = 1,706,142.57