Finding the Third Proportional to 129,298,250 and 287,294,308

Step by Step Solution

1. Step 1: Write the proportion equation
   129,298,250 : 287,294,308 = 287,294,308 : x
2. Step 2: Convert to fraction form
   129,298,250/287,294,308 = 287,294,308/x
3. Step 3: Cross multiply
   129,298,250x = 287,294,308 × 287,294,308
4. Step 4: Simplify right side
   129,298,250x = 82,538,019,409,198,864
5. Step 5: Solve for x
   x = 82,538,019,409,198,864/129,298,250
6. Step 6: Final answer
   x = 638,353,724.12