Finding the Fourth Proportional to 21,754.56, 32,613 and 12,971.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,754.56 : 32,613 = 12,971.02 : x
2. Step 2: Convert to fraction form
   21,754.56/32,613 = 12,971.02/x
3. Step 3: Cross multiply
   21,754.56x = 32,613 × 12,971.02
4. Step 4: Simplify right side
   21,754.56x = 423,023,875.26
5. Step 5: Solve for x
   x = 423,023,875.26/21,754.56
6. Step 6: Final answer
   x = 19,445.30