Finding the Third Proportional to 328,373.50 and 709,139

Step by Step Solution

1. Step 1: Write the proportion equation
   328,373.50 : 709,139 = 709,139 : x
2. Step 2: Convert to fraction form
   328,373.50/709,139 = 709,139/x
3. Step 3: Cross multiply
   328,373.50x = 709,139 × 709,139
4. Step 4: Simplify right side
   328,373.50x = 502,878,121,321
5. Step 5: Solve for x
   x = 502,878,121,321/328,373.50
6. Step 6: Final answer
   x = 1,531,421.14