Finding the Fourth Proportional to 14,621.55, 20,177.89 and 7,907.30

Step by Step Solution

1. Step 1: Write the proportion equation
   14,621.55 : 20,177.89 = 7,907.30 : x
2. Step 2: Convert to fraction form
   14,621.55/20,177.89 = 7,907.30/x
3. Step 3: Cross multiply
   14,621.55x = 20,177.89 × 7,907.30
4. Step 4: Simplify right side
   14,621.55x = 159,552,742.59
5. Step 5: Solve for x
   x = 159,552,742.59/14,621.55
6. Step 6: Final answer
   x = 10,912.17