Finding the Fourth Proportional to 16,680.06, 25,018.20 and 4,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.06 : 25,018.20 = 4,990.50 : x
2. Step 2: Convert to fraction form
   16,680.06/25,018.20 = 4,990.50/x
3. Step 3: Cross multiply
   16,680.06x = 25,018.20 × 4,990.50
4. Step 4: Simplify right side
   16,680.06x = 124,853,327.10
5. Step 5: Solve for x
   x = 124,853,327.10/16,680.06
6. Step 6: Final answer
   x = 7,485.18