Finding the Fourth Proportional to 12,989.76, 19,472.91 and 4,667.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,989.76 : 19,472.91 = 4,667.82 : x
2. Step 2: Convert to fraction form
   12,989.76/19,472.91 = 4,667.82/x
3. Step 3: Cross multiply
   12,989.76x = 19,472.91 × 4,667.82
4. Step 4: Simplify right side
   12,989.76x = 90,896,038.76
5. Step 5: Solve for x
   x = 90,896,038.76/12,989.76
6. Step 6: Final answer
   x = 6,997.51