Finding the Fourth Proportional to 21,658.72, 32,488.32 and 7,807.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,658.72 : 32,488.32 = 7,807.84 : x
2. Step 2: Convert to fraction form
   21,658.72/32,488.32 = 7,807.84/x
3. Step 3: Cross multiply
   21,658.72x = 32,488.32 × 7,807.84
4. Step 4: Simplify right side
   21,658.72x = 253,663,604.43
5. Step 5: Solve for x
   x = 253,663,604.43/21,658.72
6. Step 6: Final answer
   x = 11,711.85