Finding the Third Proportional to 136,438.69 and 287,014.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,438.69 : 287,014.50 = 287,014.50 : x
2. Step 2: Convert to fraction form
   136,438.69/287,014.50 = 287,014.50/x
3. Step 3: Cross multiply
   136,438.69x = 287,014.50 × 287,014.50
4. Step 4: Simplify right side
   136,438.69x = 82,377,323,210.25
5. Step 5: Solve for x
   x = 82,377,323,210.25/136,438.69
6. Step 6: Final answer
   x = 603,768.07