Finding the Fourth Proportional to 13,128.80, 19,693.04 and 3,268.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.80 : 19,693.04 = 3,268.16 : x
2. Step 2: Convert to fraction form
   13,128.80/19,693.04 = 3,268.16/x
3. Step 3: Cross multiply
   13,128.80x = 19,693.04 × 3,268.16
4. Step 4: Simplify right side
   13,128.80x = 64,360,005.61
5. Step 5: Solve for x
   x = 64,360,005.61/13,128.80
6. Step 6: Final answer
   x = 4,902.20