Finding the Fourth Proportional to 8,976.42, 12,388.55 and 4,997.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,976.42 : 12,388.55 = 4,997.90 : x
2. Step 2: Convert to fraction form
   8,976.42/12,388.55 = 4,997.90/x
3. Step 3: Cross multiply
   8,976.42x = 12,388.55 × 4,997.90
4. Step 4: Simplify right side
   8,976.42x = 61,916,740.03
5. Step 5: Solve for x
   x = 61,916,740.03/8,976.42
6. Step 6: Final answer
   x = 6,897.71