Finding the Fourth Proportional to 21,689.83, 32,538.12 and 7,651.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,689.83 : 32,538.12 = 7,651.72 : x
2. Step 2: Convert to fraction form
   21,689.83/32,538.12 = 7,651.72/x
3. Step 3: Cross multiply
   21,689.83x = 32,538.12 × 7,651.72
4. Step 4: Simplify right side
   21,689.83x = 248,972,583.57
5. Step 5: Solve for x
   x = 248,972,583.57/21,689.83
6. Step 6: Final answer
   x = 11,478.77