Finding the Fourth Proportional to 12,886.49, 19,312.43 and 5,488.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.49 : 19,312.43 = 5,488.97 : x
2. Step 2: Convert to fraction form
   12,886.49/19,312.43 = 5,488.97/x
3. Step 3: Cross multiply
   12,886.49x = 19,312.43 × 5,488.97
4. Step 4: Simplify right side
   12,886.49x = 106,005,224.89
5. Step 5: Solve for x
   x = 106,005,224.89/12,886.49
6. Step 6: Final answer
   x = 8,226.07