Finding the Fourth Proportional to 21,386.46, 32,085.16 and 8,902.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,386.46 : 32,085.16 = 8,902.34 : x
2. Step 2: Convert to fraction form
   21,386.46/32,085.16 = 8,902.34/x
3. Step 3: Cross multiply
   21,386.46x = 32,085.16 × 8,902.34
4. Step 4: Simplify right side
   21,386.46x = 285,632,940.91
5. Step 5: Solve for x
   x = 285,632,940.91/21,386.46
6. Step 6: Final answer
   x = 13,355.78