Finding the Fourth Proportional to 13,139.29, 18,131.50 and 7,473.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139.29 : 18,131.50 = 7,473.27 : x
2. Step 2: Convert to fraction form
   13,139.29/18,131.50 = 7,473.27/x
3. Step 3: Cross multiply
   13,139.29x = 18,131.50 × 7,473.27
4. Step 4: Simplify right side
   13,139.29x = 135,501,595.01
5. Step 5: Solve for x
   x = 135,501,595.01/13,139.29
6. Step 6: Final answer
   x = 10,312.70