Finding the Fourth Proportional to 21,050.68, 29,043.18 and 13,978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,050.68 : 29,043.18 = 13,978.52 : x
2. Step 2: Convert to fraction form
   21,050.68/29,043.18 = 13,978.52/x
3. Step 3: Cross multiply
   21,050.68x = 29,043.18 × 13,978.52
4. Step 4: Simplify right side
   21,050.68x = 405,980,672.49
5. Step 5: Solve for x
   x = 405,980,672.49/21,050.68
6. Step 6: Final answer
   x = 19,285.87