Finding the Fourth Proportional to 21,789, 32,686.20 and 6,996.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,789 : 32,686.20 = 6,996.24 : x
2. Step 2: Convert to fraction form
   21,789/32,686.20 = 6,996.24/x
3. Step 3: Cross multiply
   21,789x = 32,686.20 × 6,996.24
4. Step 4: Simplify right side
   21,789x = 228,680,499.89
5. Step 5: Solve for x
   x = 228,680,499.89/21,789
6. Step 6: Final answer
   x = 10,495.23