Finding the Fourth Proportional to 21,301.78, 29,412.10 and 13,752.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,301.78 : 29,412.10 = 13,752.51 : x
2. Step 2: Convert to fraction form
   21,301.78/29,412.10 = 13,752.51/x
3. Step 3: Cross multiply
   21,301.78x = 29,412.10 × 13,752.51
4. Step 4: Simplify right side
   21,301.78x = 404,490,130.61
5. Step 5: Solve for x
   x = 404,490,130.61/21,301.78
6. Step 6: Final answer
   x = 18,988.56