Finding the Fourth Proportional to 21,238.32, 29,313.72 and 13,773.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,238.32 : 29,313.72 = 13,773.36 : x
2. Step 2: Convert to fraction form
   21,238.32/29,313.72 = 13,773.36/x
3. Step 3: Cross multiply
   21,238.32x = 29,313.72 × 13,773.36
4. Step 4: Simplify right side
   21,238.32x = 403,748,418.50
5. Step 5: Solve for x
   x = 403,748,418.50/21,238.32
6. Step 6: Final answer
   x = 19,010.37