Finding the Fourth Proportional to 21,420.59, 32,127.71 and 8,271.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,420.59 : 32,127.71 = 8,271.32 : x
2. Step 2: Convert to fraction form
   21,420.59/32,127.71 = 8,271.32/x
3. Step 3: Cross multiply
   21,420.59x = 32,127.71 × 8,271.32
4. Step 4: Simplify right side
   21,420.59x = 265,738,368.28
5. Step 5: Solve for x
   x = 265,738,368.28/21,420.59
6. Step 6: Final answer
   x = 12,405.75