Finding the Fourth Proportional to 35,479.62, 53,190.56 and 13,280.55

Step by Step Solution

1. Step 1: Write the proportion equation
   35,479.62 : 53,190.56 = 13,280.55 : x
2. Step 2: Convert to fraction form
   35,479.62/53,190.56 = 13,280.55/x
3. Step 3: Cross multiply
   35,479.62x = 53,190.56 × 13,280.55
4. Step 4: Simplify right side
   35,479.62x = 706,399,891.61
5. Step 5: Solve for x
   x = 706,399,891.61/35,479.62
6. Step 6: Final answer
   x = 19,910.02