Finding the Fourth Proportional to 12,992.90, 19,491.15 and 4,671.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.90 : 19,491.15 = 4,671.37 : x
2. Step 2: Convert to fraction form
   12,992.90/19,491.15 = 4,671.37/x
3. Step 3: Cross multiply
   12,992.90x = 19,491.15 × 4,671.37
4. Step 4: Simplify right side
   12,992.90x = 91,050,275.92
5. Step 5: Solve for x
   x = 91,050,275.92/12,992.90
6. Step 6: Final answer
   x = 7,007.69