Finding the Fourth Proportional to 9,172.50, 12,658.20 and 4,980.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172.50 : 12,658.20 = 4,980.76 : x
2. Step 2: Convert to fraction form
   9,172.50/12,658.20 = 4,980.76/x
3. Step 3: Cross multiply
   9,172.50x = 12,658.20 × 4,980.76
4. Step 4: Simplify right side
   9,172.50x = 63,047,456.23
5. Step 5: Solve for x
   x = 63,047,456.23/9,172.50
6. Step 6: Final answer
   x = 6,873.53