Finding the Fourth Proportional to 12,681.98, 19,009.31 and 5,284.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.98 : 19,009.31 = 5,284.46 : x
2. Step 2: Convert to fraction form
   12,681.98/19,009.31 = 5,284.46/x
3. Step 3: Cross multiply
   12,681.98x = 19,009.31 × 5,284.46
4. Step 4: Simplify right side
   12,681.98x = 100,453,938.32
5. Step 5: Solve for x
   x = 100,453,938.32/12,681.98
6. Step 6: Final answer
   x = 7,921.00