Finding the Third Proportional to 307,988,274 and 684,837,870

Step by Step Solution

1. Step 1: Write the proportion equation
   307,988,274 : 684,837,870 = 684,837,870 : x
2. Step 2: Convert to fraction form
   307,988,274/684,837,870 = 684,837,870/x
3. Step 3: Cross multiply
   307,988,274x = 684,837,870 × 684,837,870
4. Step 4: Simplify right side
   307,988,274x = 469,002,908,186,136,896
5. Step 5: Solve for x
   x = 469,002,908,186,136,896/307,988,274
6. Step 6: Final answer
   x = 1,522,794,689.86