Finding the Fourth Proportional to 12,406.62, 17,108.48 and 10,620.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.62 : 17,108.48 = 10,620.02 : x
2. Step 2: Convert to fraction form
   12,406.62/17,108.48 = 10,620.02/x
3. Step 3: Cross multiply
   12,406.62x = 17,108.48 × 10,620.02
4. Step 4: Simplify right side
   12,406.62x = 181,692,399.77
5. Step 5: Solve for x
   x = 181,692,399.77/12,406.62
6. Step 6: Final answer
   x = 14,644.79