Finding the Fourth Proportional to 2,116,521,728, 3,174,577,446.57 and 642,674,492.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,521,728 : 3,174,577,446.57 = 642,674,492.25 : x
2. Step 2: Convert to fraction form
   2,116,521,728/3,174,577,446.57 = 642,674,492.25/x
3. Step 3: Cross multiply
   2,116,521,728x = 3,174,577,446.57 × 642,674,492.25
4. Step 4: Simplify right side
   2,116,521,728x = 2,040,219,948,582,676,480
5. Step 5: Solve for x
   x = 2,040,219,948,582,676,480/2,116,521,728
6. Step 6: Final answer
   x = 963,949,446.68