Finding the Fourth Proportional to 21,621.72, 32,435.91 and 9,141.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,621.72 : 32,435.91 = 9,141.78 : x
2. Step 2: Convert to fraction form
   21,621.72/32,435.91 = 9,141.78/x
3. Step 3: Cross multiply
   21,621.72x = 32,435.91 × 9,141.78
4. Step 4: Simplify right side
   21,621.72x = 296,521,953.32
5. Step 5: Solve for x
   x = 296,521,953.32/21,621.72
6. Step 6: Final answer
   x = 13,714.08