Finding the Fourth Proportional to 12,556.64, 18,818.82 and 5,152.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,556.64 : 18,818.82 = 5,152.22 : x
2. Step 2: Convert to fraction form
   12,556.64/18,818.82 = 5,152.22/x
3. Step 3: Cross multiply
   12,556.64x = 18,818.82 × 5,152.22
4. Step 4: Simplify right side
   12,556.64x = 96,958,700.78
5. Step 5: Solve for x
   x = 96,958,700.78/12,556.64
6. Step 6: Final answer
   x = 7,721.71