Finding the Fourth Proportional to 21,152.35, 29,174.72 and 15,190.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.35 : 29,174.72 = 15,190.14 : x
2. Step 2: Convert to fraction form
   21,152.35/29,174.72 = 15,190.14/x
3. Step 3: Cross multiply
   21,152.35x = 29,174.72 × 15,190.14
4. Step 4: Simplify right side
   21,152.35x = 443,168,005.31
5. Step 5: Solve for x
   x = 443,168,005.31/21,152.35
6. Step 6: Final answer
   x = 20,951.24