Finding the Fourth Proportional to 21,658.34, 32,487.69 and 7,618.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,658.34 : 32,487.69 = 7,618.47 : x
2. Step 2: Convert to fraction form
   21,658.34/32,487.69 = 7,618.47/x
3. Step 3: Cross multiply
   21,658.34x = 32,487.69 × 7,618.47
4. Step 4: Simplify right side
   21,658.34x = 247,506,398.37
5. Step 5: Solve for x
   x = 247,506,398.37/21,658.34
6. Step 6: Final answer
   x = 11,427.76