Finding the Fourth Proportional to 13,010.39, 19,518.69 and 4,245.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,010.39 : 19,518.69 = 4,245.31 : x
2. Step 2: Convert to fraction form
   13,010.39/19,518.69 = 4,245.31/x
3. Step 3: Cross multiply
   13,010.39x = 19,518.69 × 4,245.31
4. Step 4: Simplify right side
   13,010.39x = 82,862,889.84
5. Step 5: Solve for x
   x = 82,862,889.84/13,010.39
6. Step 6: Final answer
   x = 6,368.98