Finding the Fourth Proportional to 21,374.88, 29,505.56 and 19,132.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,374.88 : 29,505.56 = 19,132.80 : x
2. Step 2: Convert to fraction form
   21,374.88/29,505.56 = 19,132.80/x
3. Step 3: Cross multiply
   21,374.88x = 29,505.56 × 19,132.80
4. Step 4: Simplify right side
   21,374.88x = 564,523,978.37
5. Step 5: Solve for x
   x = 564,523,978.37/21,374.88
6. Step 6: Final answer
   x = 26,410.63