Finding the Fourth Proportional to 12,319.78, 18,488.59 and 4,926.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,319.78 : 18,488.59 = 4,926.31 : x
2. Step 2: Convert to fraction form
   12,319.78/18,488.59 = 4,926.31/x
3. Step 3: Cross multiply
   12,319.78x = 18,488.59 × 4,926.31
4. Step 4: Simplify right side
   12,319.78x = 91,080,525.80
5. Step 5: Solve for x
   x = 91,080,525.80/12,319.78
6. Step 6: Final answer
   x = 7,393.03