Finding the Fourth Proportional to 21,062,168, 31,593,252 and 5,105,816

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062,168 : 31,593,252 = 5,105,816 : x
2. Step 2: Convert to fraction form
   21,062,168/31,593,252 = 5,105,816/x
3. Step 3: Cross multiply
   21,062,168x = 31,593,252 × 5,105,816
4. Step 4: Simplify right side
   21,062,168x = 161,309,331,553,632
5. Step 5: Solve for x
   x = 161,309,331,553,632/21,062,168
6. Step 6: Final answer
   x = 7,658,724