Finding the Fourth Proportional to 9,912.10, 14,864.55 and 4,980.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,912.10 : 14,864.55 = 4,980.10 : x
2. Step 2: Convert to fraction form
   9,912.10/14,864.55 = 4,980.10/x
3. Step 3: Cross multiply
   9,912.10x = 14,864.55 × 4,980.10
4. Step 4: Simplify right side
   9,912.10x = 74,026,945.46
5. Step 5: Solve for x
   x = 74,026,945.46/9,912.10
6. Step 6: Final answer
   x = 7,468.34