Finding the Fourth Proportional to 21,530.34, 29,711.61 and 12,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,530.34 : 29,711.61 = 12,100.50 : x
2. Step 2: Convert to fraction form
   21,530.34/29,711.61 = 12,100.50/x
3. Step 3: Cross multiply
   21,530.34x = 29,711.61 × 12,100.50
4. Step 4: Simplify right side
   21,530.34x = 359,525,336.81
5. Step 5: Solve for x
   x = 359,525,336.81/21,530.34
6. Step 6: Final answer
   x = 16,698.54