Finding the Fourth Proportional to 13,320.03, 19,980.03 and 3,960.00

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.03 : 19,980.03 = 3,960.00 : x
2. Step 2: Convert to fraction form
   13,320.03/19,980.03 = 3,960.00/x
3. Step 3: Cross multiply
   13,320.03x = 19,980.03 × 3,960.00
4. Step 4: Simplify right side
   13,320.03x = 79,121,008.58
5. Step 5: Solve for x
   x = 79,121,008.58/13,320.03
6. Step 6: Final answer
   x = 5,940.00