Finding the Third Proportional to 353,113 and 784,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   353,113 : 784,685.50 = 784,685.50 : x
2. Step 2: Convert to fraction form
   353,113/784,685.50 = 784,685.50/x
3. Step 3: Cross multiply
   353,113x = 784,685.50 × 784,685.50
4. Step 4: Simplify right side
   353,113x = 615,731,333,910.25
5. Step 5: Solve for x
   x = 615,731,333,910.25/353,113
6. Step 6: Final answer
   x = 1,743,723.21