Finding the Fourth Proportional to 21,061.37, 29,064.50 and 11,501.21

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.37 : 29,064.50 = 11,501.21 : x
2. Step 2: Convert to fraction form
   21,061.37/29,064.50 = 11,501.21/x
3. Step 3: Cross multiply
   21,061.37x = 29,064.50 × 11,501.21
4. Step 4: Simplify right side
   21,061.37x = 334,276,715.22
5. Step 5: Solve for x
   x = 334,276,715.22/21,061.37
6. Step 6: Final answer
   x = 15,871.56