Finding the Fourth Proportional to 21,061.20, 29,064.52 and 11,501.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.20 : 29,064.52 = 11,501.18 : x
2. Step 2: Convert to fraction form
   21,061.20/29,064.52 = 11,501.18/x
3. Step 3: Cross multiply
   21,061.20x = 29,064.52 × 11,501.18
4. Step 4: Simplify right side
   21,061.20x = 334,276,254.18
5. Step 5: Solve for x
   x = 334,276,254.18/21,061.20
6. Step 6: Final answer
   x = 15,871.66