Finding the Third Proportional to 138,316.50 and 303,417

Step by Step Solution

1. Step 1: Write the proportion equation
   138,316.50 : 303,417 = 303,417 : x
2. Step 2: Convert to fraction form
   138,316.50/303,417 = 303,417/x
3. Step 3: Cross multiply
   138,316.50x = 303,417 × 303,417
4. Step 4: Simplify right side
   138,316.50x = 92,061,875,889
5. Step 5: Solve for x
   x = 92,061,875,889/138,316.50
6. Step 6: Final answer
   x = 665,588.53