Finding the Third Proportional to 136,746 and 287,316

Step by Step Solution

1. Step 1: Write the proportion equation
   136,746 : 287,316 = 287,316 : x
2. Step 2: Convert to fraction form
   136,746/287,316 = 287,316/x
3. Step 3: Cross multiply
   136,746x = 287,316 × 287,316
4. Step 4: Simplify right side
   136,746x = 82,550,483,856
5. Step 5: Solve for x
   x = 82,550,483,856/136,746
6. Step 6: Final answer
   x = 603,677.50