Finding the Fourth Proportional to 21,498.37, 29,673.92 and 13,000.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.37 : 29,673.92 = 13,000.50 : x
2. Step 2: Convert to fraction form
   21,498.37/29,673.92 = 13,000.50/x
3. Step 3: Cross multiply
   21,498.37x = 29,673.92 × 13,000.50
4. Step 4: Simplify right side
   21,498.37x = 385,775,829.46
5. Step 5: Solve for x
   x = 385,775,829.46/21,498.37
6. Step 6: Final answer
   x = 17,944.42