Finding the Third Proportional to 153,111 and 328,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,111 : 328,357.50 = 328,357.50 : x
2. Step 2: Convert to fraction form
   153,111/328,357.50 = 328,357.50/x
3. Step 3: Cross multiply
   153,111x = 328,357.50 × 328,357.50
4. Step 4: Simplify right side
   153,111x = 107,818,647,806.25
5. Step 5: Solve for x
   x = 107,818,647,806.25/153,111
6. Step 6: Final answer
   x = 704,186.16