Finding the Fourth Proportional to 12,005.92, 18,005.82 and 4,987.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,005.92 : 18,005.82 = 4,987.99 : x
2. Step 2: Convert to fraction form
   12,005.92/18,005.82 = 4,987.99/x
3. Step 3: Cross multiply
   12,005.92x = 18,005.82 × 4,987.99
4. Step 4: Simplify right side
   12,005.92x = 89,812,850.10
5. Step 5: Solve for x
   x = 89,812,850.10/12,005.92
6. Step 6: Final answer
   x = 7,480.71