Finding the Fourth Proportional to 13,723.83, 18,938.91 and 7,436.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,723.83 : 18,938.91 = 7,436.21 : x
2. Step 2: Convert to fraction form
   13,723.83/18,938.91 = 7,436.21/x
3. Step 3: Cross multiply
   13,723.83x = 18,938.91 × 7,436.21
4. Step 4: Simplify right side
   13,723.83x = 140,833,617.24
5. Step 5: Solve for x
   x = 140,833,617.24/13,723.83
6. Step 6: Final answer
   x = 10,261.98