Finding the Fourth Proportional to 6,662.04, 9,990.50 and 1,980.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,662.04 : 9,990.50 = 1,980.96 : x
2. Step 2: Convert to fraction form
   6,662.04/9,990.50 = 1,980.96/x
3. Step 3: Cross multiply
   6,662.04x = 9,990.50 × 1,980.96
4. Step 4: Simplify right side
   6,662.04x = 19,790,770.98
5. Step 5: Solve for x
   x = 19,790,770.98/6,662.04
6. Step 6: Final answer
   x = 2,970.68