Finding the Fourth Proportional to 23,776.71, 32,811.57 and 13,021.47

Step by Step Solution

1. Step 1: Write the proportion equation
   23,776.71 : 32,811.57 = 13,021.47 : x
2. Step 2: Convert to fraction form
   23,776.71/32,811.57 = 13,021.47/x
3. Step 3: Cross multiply
   23,776.71x = 32,811.57 × 13,021.47
4. Step 4: Simplify right side
   23,776.71x = 427,254,874.41
5. Step 5: Solve for x
   x = 427,254,874.41/23,776.71
6. Step 6: Final answer
   x = 17,969.47