Finding the Fourth Proportional to 11,556.37, 17,397.69 and 7,881.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,556.37 : 17,397.69 = 7,881.91 : x
2. Step 2: Convert to fraction form
   11,556.37/17,397.69 = 7,881.91/x
3. Step 3: Cross multiply
   11,556.37x = 17,397.69 × 7,881.91
4. Step 4: Simplify right side
   11,556.37x = 137,126,953.74
5. Step 5: Solve for x
   x = 137,126,953.74/11,556.37
6. Step 6: Final answer
   x = 11,865.92