Finding the Fourth Proportional to 9,980.72, 14,974.32 and 4,787

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.72 : 14,974.32 = 4,787 : x
2. Step 2: Convert to fraction form
   9,980.72/14,974.32 = 4,787/x
3. Step 3: Cross multiply
   9,980.72x = 14,974.32 × 4,787
4. Step 4: Simplify right side
   9,980.72x = 71,682,069.84
5. Step 5: Solve for x
   x = 71,682,069.84/9,980.72
6. Step 6: Final answer
   x = 7,182.05