Finding the Fourth Proportional to 21,499.16, 32,238.14 and 12,631.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499.16 : 32,238.14 = 12,631.76 : x
2. Step 2: Convert to fraction form
   21,499.16/32,238.14 = 12,631.76/x
3. Step 3: Cross multiply
   21,499.16x = 32,238.14 × 12,631.76
4. Step 4: Simplify right side
   21,499.16x = 407,224,447.33
5. Step 5: Solve for x
   x = 407,224,447.33/21,499.16
6. Step 6: Final answer
   x = 18,941.41