Finding the Third Proportional to 136,432.50 and 287,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,432.50 : 287,003.50 = 287,003.50 : x
2. Step 2: Convert to fraction form
   136,432.50/287,003.50 = 287,003.50/x
3. Step 3: Cross multiply
   136,432.50x = 287,003.50 × 287,003.50
4. Step 4: Simplify right side
   136,432.50x = 82,371,009,012.25
5. Step 5: Solve for x
   x = 82,371,009,012.25/136,432.50
6. Step 6: Final answer
   x = 603,749.17