Finding the Fourth Proportional to 21,456, 32,188.14 and 10,370.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456 : 32,188.14 = 10,370.34 : x
2. Step 2: Convert to fraction form
   21,456/32,188.14 = 10,370.34/x
3. Step 3: Cross multiply
   21,456x = 32,188.14 × 10,370.34
4. Step 4: Simplify right side
   21,456x = 333,801,955.77
5. Step 5: Solve for x
   x = 333,801,955.77/21,456
6. Step 6: Final answer
   x = 15,557.51