Finding the Third Proportional to 31,513,436 and 68,548,318

Step by Step Solution

1. Step 1: Write the proportion equation
   31,513,436 : 68,548,318 = 68,548,318 : x
2. Step 2: Convert to fraction form
   31,513,436/68,548,318 = 68,548,318/x
3. Step 3: Cross multiply
   31,513,436x = 68,548,318 × 68,548,318
4. Step 4: Simplify right side
   31,513,436x = 4,698,871,900,629,124
5. Step 5: Solve for x
   x = 4,698,871,900,629,124/31,513,436
6. Step 6: Final answer
   x = 149,106,936.50