Finding the Third Proportional to 641,754,738 and 1,406,538,068

Step by Step Solution

1. Step 1: Write the proportion equation
   641,754,738 : 1,406,538,068 = 1,406,538,068 : x
2. Step 2: Convert to fraction form
   641,754,738/1,406,538,068 = 1,406,538,068/x
3. Step 3: Cross multiply
   641,754,738x = 1,406,538,068 × 1,406,538,068
4. Step 4: Simplify right side
   641,754,738x = 1,978,349,336,733,172,736
5. Step 5: Solve for x
   x = 1,978,349,336,733,172,736/641,754,738
6. Step 6: Final answer
   x = 3,082,718,707.93