Finding the Fourth Proportional to 21,614, 32,430.76 and 12,380

Step by Step Solution

1. Step 1: Write the proportion equation
   21,614 : 32,430.76 = 12,380 : x
2. Step 2: Convert to fraction form
   21,614/32,430.76 = 12,380/x
3. Step 3: Cross multiply
   21,614x = 32,430.76 × 12,380
4. Step 4: Simplify right side
   21,614x = 401,492,808.80
5. Step 5: Solve for x
   x = 401,492,808.80/21,614
6. Step 6: Final answer
   x = 18,575.59