Finding the Fourth Proportional to 21,478.16, 32,206.31 and 7,436.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,478.16 : 32,206.31 = 7,436.71 : x
2. Step 2: Convert to fraction form
   21,478.16/32,206.31 = 7,436.71/x
3. Step 3: Cross multiply
   21,478.16x = 32,206.31 × 7,436.71
4. Step 4: Simplify right side
   21,478.16x = 239,509,018.60
5. Step 5: Solve for x
   x = 239,509,018.60/21,478.16
6. Step 6: Final answer
   x = 11,151.28