Finding the Fourth Proportional to 21,562,612.68, 29,756,006.42 and 12,269,976.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,562,612.68 : 29,756,006.42 = 12,269,976.78 : x
2. Step 2: Convert to fraction form
   21,562,612.68/29,756,006.42 = 12,269,976.78/x
3. Step 3: Cross multiply
   21,562,612.68x = 29,756,006.42 × 12,269,976.78
4. Step 4: Simplify right side
   21,562,612.68x = 365,105,507,838,930.94
5. Step 5: Solve for x
   x = 365,105,507,838,930.94/21,562,612.68
6. Step 6: Final answer
   x = 16,932,340.87