Finding the Fourth Proportional to 21,406.37, 32,100.50 and 6,415.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,406.37 : 32,100.50 = 6,415.61 : x
2. Step 2: Convert to fraction form
   21,406.37/32,100.50 = 6,415.61/x
3. Step 3: Cross multiply
   21,406.37x = 32,100.50 × 6,415.61
4. Step 4: Simplify right side
   21,406.37x = 205,944,096.22
5. Step 5: Solve for x
   x = 205,944,096.22/21,406.37
6. Step 6: Final answer
   x = 9,620.69