Finding the Third Proportional to 129,618 and 284,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,618 : 284,152.50 = 284,152.50 : x
2. Step 2: Convert to fraction form
   129,618/284,152.50 = 284,152.50/x
3. Step 3: Cross multiply
   129,618x = 284,152.50 × 284,152.50
4. Step 4: Simplify right side
   129,618x = 80,742,643,256.25
5. Step 5: Solve for x
   x = 80,742,643,256.25/129,618
6. Step 6: Final answer
   x = 622,927.70