Finding the Third Proportional to 314,559,126 and 689,584,428

Step by Step Solution

1. Step 1: Write the proportion equation
   314,559,126 : 689,584,428 = 689,584,428 : x
2. Step 2: Convert to fraction form
   314,559,126/689,584,428 = 689,584,428/x
3. Step 3: Cross multiply
   314,559,126x = 689,584,428 × 689,584,428
4. Step 4: Simplify right side
   314,559,126x = 475,526,683,340,087,168
5. Step 5: Solve for x
   x = 475,526,683,340,087,168/314,559,126
6. Step 6: Final answer
   x = 1,511,724,327.91