Finding the Third Proportional to 12,701,478 and 29,978,499

Step by Step Solution

1. Step 1: Write the proportion equation
   12,701,478 : 29,978,499 = 29,978,499 : x
2. Step 2: Convert to fraction form
   12,701,478/29,978,499 = 29,978,499/x
3. Step 3: Cross multiply
   12,701,478x = 29,978,499 × 29,978,499
4. Step 4: Simplify right side
   12,701,478x = 898,710,402,293,001
5. Step 5: Solve for x
   x = 898,710,402,293,001/12,701,478
6. Step 6: Final answer
   x = 70,756,364.12