Finding the Fourth Proportional to 21,379,142.72, 29,496,280.65 and 12,085,814.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,379,142.72 : 29,496,280.65 = 12,085,814.27 : x
2. Step 2: Convert to fraction form
   21,379,142.72/29,496,280.65 = 12,085,814.27/x
3. Step 3: Cross multiply
   21,379,142.72x = 29,496,280.65 × 12,085,814.27
4. Step 4: Simplify right side
   21,379,142.72x = 356,486,569,444,213.50
5. Step 5: Solve for x
   x = 356,486,569,444,213.50/21,379,142.72
6. Step 6: Final answer
   x = 16,674,502.54