Finding the Third Proportional to 31,152,837 and 68,178,426

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152,837 : 68,178,426 = 68,178,426 : x
2. Step 2: Convert to fraction form
   31,152,837/68,178,426 = 68,178,426/x
3. Step 3: Cross multiply
   31,152,837x = 68,178,426 × 68,178,426
4. Step 4: Simplify right side
   31,152,837x = 4,648,297,771,837,476
5. Step 5: Solve for x
   x = 4,648,297,771,837,476/31,152,837
6. Step 6: Final answer
   x = 149,209,453.12