Finding the Third Proportional to 136,746 and 287,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,746 : 287,311.50 = 287,311.50 : x
2. Step 2: Convert to fraction form
   136,746/287,311.50 = 287,311.50/x
3. Step 3: Cross multiply
   136,746x = 287,311.50 × 287,311.50
4. Step 4: Simplify right side
   136,746x = 82,547,898,032.25
5. Step 5: Solve for x
   x = 82,547,898,032.25/136,746
6. Step 6: Final answer
   x = 603,658.59