Finding the Fourth Proportional to 12,256.88, 16,905.33 and 7,781.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.88 : 16,905.33 = 7,781.94 : x
2. Step 2: Convert to fraction form
   12,256.88/16,905.33 = 7,781.94/x
3. Step 3: Cross multiply
   12,256.88x = 16,905.33 × 7,781.94
4. Step 4: Simplify right side
   12,256.88x = 131,556,263.74
5. Step 5: Solve for x
   x = 131,556,263.74/12,256.88
6. Step 6: Final answer
   x = 10,733.26