Finding the Fourth Proportional to 21,388.25, 29,523.89 and 19,146.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,388.25 : 29,523.89 = 19,146.07 : x
2. Step 2: Convert to fraction form
   21,388.25/29,523.89 = 19,146.07/x
3. Step 3: Cross multiply
   21,388.25x = 29,523.89 × 19,146.07
4. Step 4: Simplify right side
   21,388.25x = 565,266,549.38
5. Step 5: Solve for x
   x = 565,266,549.38/21,388.25
6. Step 6: Final answer
   x = 26,428.83