Finding the Fourth Proportional to 30,514.28, 42,092.78 and 21,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,514.28 : 42,092.78 = 21,453.50 : x
2. Step 2: Convert to fraction form
   30,514.28/42,092.78 = 21,453.50/x
3. Step 3: Cross multiply
   30,514.28x = 42,092.78 × 21,453.50
4. Step 4: Simplify right side
   30,514.28x = 903,037,138.00
5. Step 5: Solve for x
   x = 903,037,138.00/30,514.28
6. Step 6: Final answer
   x = 29,593.92