Finding the Fourth Proportional to 21,530.52, 29,714.76 and 12,100.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,530.52 : 29,714.76 = 12,100.80 : x
2. Step 2: Convert to fraction form
   21,530.52/29,714.76 = 12,100.80/x
3. Step 3: Cross multiply
   21,530.52x = 29,714.76 × 12,100.80
4. Step 4: Simplify right side
   21,530.52x = 359,572,367.81
5. Step 5: Solve for x
   x = 359,572,367.81/21,530.52
6. Step 6: Final answer
   x = 16,700.59