Finding the Fourth Proportional to 28,111.59, 38,791.71 and 15,536.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,111.59 : 38,791.71 = 15,536.34 : x
2. Step 2: Convert to fraction form
   28,111.59/38,791.71 = 15,536.34/x
3. Step 3: Cross multiply
   28,111.59x = 38,791.71 × 15,536.34
4. Step 4: Simplify right side
   28,111.59x = 602,681,195.74
5. Step 5: Solve for x
   x = 602,681,195.74/28,111.59
6. Step 6: Final answer
   x = 21,438.89