Finding the Third Proportional to 308,418 and 460,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,418 : 460,068.50 = 460,068.50 : x
2. Step 2: Convert to fraction form
   308,418/460,068.50 = 460,068.50/x
3. Step 3: Cross multiply
   308,418x = 460,068.50 × 460,068.50
4. Step 4: Simplify right side
   308,418x = 211,663,024,692.25
5. Step 5: Solve for x
   x = 211,663,024,692.25/308,418
6. Step 6: Final answer
   x = 686,286.22