Finding the Fourth Proportional to 23,507.82, 32,439.72 and 12,897.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,507.82 : 32,439.72 = 12,897.21 : x
2. Step 2: Convert to fraction form
   23,507.82/32,439.72 = 12,897.21/x
3. Step 3: Cross multiply
   23,507.82x = 32,439.72 × 12,897.21
4. Step 4: Simplify right side
   23,507.82x = 418,381,881.18
5. Step 5: Solve for x
   x = 418,381,881.18/23,507.82
6. Step 6: Final answer
   x = 17,797.56