Finding the Fourth Proportional to 21,416.59, 29,558.00 and 12,340.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,416.59 : 29,558.00 = 12,340.18 : x
2. Step 2: Convert to fraction form
   21,416.59/29,558.00 = 12,340.18/x
3. Step 3: Cross multiply
   21,416.59x = 29,558.00 × 12,340.18
4. Step 4: Simplify right side
   21,416.59x = 364,750,978.74
5. Step 5: Solve for x
   x = 364,750,978.74/21,416.59
6. Step 6: Final answer
   x = 17,031.24