Finding the Fourth Proportional to 8,992.12, 12,406.20 and 5,012.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,992.12 : 12,406.20 = 5,012.47 : x
2. Step 2: Convert to fraction form
   8,992.12/12,406.20 = 5,012.47/x
3. Step 3: Cross multiply
   8,992.12x = 12,406.20 × 5,012.47
4. Step 4: Simplify right side
   8,992.12x = 62,185,705.31
5. Step 5: Solve for x
   x = 62,185,705.31/8,992.12
6. Step 6: Final answer
   x = 6,915.58