Finding the Third Proportional to 205,988.50 and 318,784

Step by Step Solution

1. Step 1: Write the proportion equation
   205,988.50 : 318,784 = 318,784 : x
2. Step 2: Convert to fraction form
   205,988.50/318,784 = 318,784/x
3. Step 3: Cross multiply
   205,988.50x = 318,784 × 318,784
4. Step 4: Simplify right side
   205,988.50x = 101,623,238,656
5. Step 5: Solve for x
   x = 101,623,238,656/205,988.50
6. Step 6: Final answer
   x = 493,344.23