Finding the Fourth Proportional to 31,538.18, 43,530.27 and 18,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,538.18 : 43,530.27 = 18,960.50 : x
2. Step 2: Convert to fraction form
   31,538.18/43,530.27 = 18,960.50/x
3. Step 3: Cross multiply
   31,538.18x = 43,530.27 × 18,960.50
4. Step 4: Simplify right side
   31,538.18x = 825,355,684.34
5. Step 5: Solve for x
   x = 825,355,684.34/31,538.18
6. Step 6: Final answer
   x = 26,170.05