Finding the Fourth Proportional to 21,176.41, 31,765.28 and 7,852.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,176.41 : 31,765.28 = 7,852.72 : x
2. Step 2: Convert to fraction form
   21,176.41/31,765.28 = 7,852.72/x
3. Step 3: Cross multiply
   21,176.41x = 31,765.28 × 7,852.72
4. Step 4: Simplify right side
   21,176.41x = 249,443,810.30
5. Step 5: Solve for x
   x = 249,443,810.30/21,176.41
6. Step 6: Final answer
   x = 11,779.32