Finding the Fourth Proportional to 12,690.72, 19,026.72 and 4,896

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.72 : 19,026.72 = 4,896 : x
2. Step 2: Convert to fraction form
   12,690.72/19,026.72 = 4,896/x
3. Step 3: Cross multiply
   12,690.72x = 19,026.72 × 4,896
4. Step 4: Simplify right side
   12,690.72x = 93,154,821.12
5. Step 5: Solve for x
   x = 93,154,821.12/12,690.72
6. Step 6: Final answer
   x = 7,340.39