Finding the Third Proportional to 31,152,834 and 68,178,456

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152,834 : 68,178,456 = 68,178,456 : x
2. Step 2: Convert to fraction form
   31,152,834/68,178,456 = 68,178,456/x
3. Step 3: Cross multiply
   31,152,834x = 68,178,456 × 68,178,456
4. Step 4: Simplify right side
   31,152,834x = 4,648,301,862,543,936
5. Step 5: Solve for x
   x = 4,648,301,862,543,936/31,152,834
6. Step 6: Final answer
   x = 149,209,598.80