Finding the Fourth Proportional to 21,784.86, 30,064.10 and 12,832.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,784.86 : 30,064.10 = 12,832.74 : x
2. Step 2: Convert to fraction form
   21,784.86/30,064.10 = 12,832.74/x
3. Step 3: Cross multiply
   21,784.86x = 30,064.10 × 12,832.74
4. Step 4: Simplify right side
   21,784.86x = 385,804,714.47
5. Step 5: Solve for x
   x = 385,804,714.47/21,784.86
6. Step 6: Final answer
   x = 17,709.76