Finding the Fourth Proportional to 21,627.55, 29,801.72 and 15,953.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,627.55 : 29,801.72 = 15,953.30 : x
2. Step 2: Convert to fraction form
   21,627.55/29,801.72 = 15,953.30/x
3. Step 3: Cross multiply
   21,627.55x = 29,801.72 × 15,953.30
4. Step 4: Simplify right side
   21,627.55x = 475,435,699.91
5. Step 5: Solve for x
   x = 475,435,699.91/21,627.55
6. Step 6: Final answer
   x = 21,982.88