Finding the Fourth Proportional to 21,536.64, 29,713.69 and 13,036.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,536.64 : 29,713.69 = 13,036.05 : x
2. Step 2: Convert to fraction form
   21,536.64/29,713.69 = 13,036.05/x
3. Step 3: Cross multiply
   21,536.64x = 29,713.69 × 13,036.05
4. Step 4: Simplify right side
   21,536.64x = 387,349,148.52
5. Step 5: Solve for x
   x = 387,349,148.52/21,536.64
6. Step 6: Final answer
   x = 17,985.59