Finding the Fourth Proportional to 21,530.56, 29,710.64 and 12,100.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,530.56 : 29,710.64 = 12,100.56 : x
2. Step 2: Convert to fraction form
   21,530.56/29,710.64 = 12,100.56/x
3. Step 3: Cross multiply
   21,530.56x = 29,710.64 × 12,100.56
4. Step 4: Simplify right side
   21,530.56x = 359,515,381.96
5. Step 5: Solve for x
   x = 359,515,381.96/21,530.56
6. Step 6: Final answer
   x = 16,697.91