Finding the Fourth Proportional to 35,658.41, 53,499.81 and 13,478.18

Step by Step Solution

1. Step 1: Write the proportion equation
   35,658.41 : 53,499.81 = 13,478.18 : x
2. Step 2: Convert to fraction form
   35,658.41/53,499.81 = 13,478.18/x
3. Step 3: Cross multiply
   35,658.41x = 53,499.81 × 13,478.18
4. Step 4: Simplify right side
   35,658.41x = 721,080,069.15
5. Step 5: Solve for x
   x = 721,080,069.15/35,658.41
6. Step 6: Final answer
   x = 20,221.88