Finding the Fourth Proportional to 9,921.33, 14,865.57 and 4,980.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,921.33 : 14,865.57 = 4,980.54 : x
2. Step 2: Convert to fraction form
   9,921.33/14,865.57 = 4,980.54/x
3. Step 3: Cross multiply
   9,921.33x = 14,865.57 × 4,980.54
4. Step 4: Simplify right side
   9,921.33x = 74,038,566.01
5. Step 5: Solve for x
   x = 74,038,566.01/9,921.33
6. Step 6: Final answer
   x = 7,462.56