Finding the Third Proportional to 331,888.50 and 780,147

Step by Step Solution

1. Step 1: Write the proportion equation
   331,888.50 : 780,147 = 780,147 : x
2. Step 2: Convert to fraction form
   331,888.50/780,147 = 780,147/x
3. Step 3: Cross multiply
   331,888.50x = 780,147 × 780,147
4. Step 4: Simplify right side
   331,888.50x = 608,629,341,609
5. Step 5: Solve for x
   x = 608,629,341,609/331,888.50
6. Step 6: Final answer
   x = 1,833,836.79