Finding the Fourth Proportional to 35,309.69, 48,731.69 and 20,405.69

Step by Step Solution

1. Step 1: Write the proportion equation
   35,309.69 : 48,731.69 = 20,405.69 : x
2. Step 2: Convert to fraction form
   35,309.69/48,731.69 = 20,405.69/x
3. Step 3: Cross multiply
   35,309.69x = 48,731.69 × 20,405.69
4. Step 4: Simplify right side
   35,309.69x = 994,403,759.32
5. Step 5: Solve for x
   x = 994,403,759.32/35,309.69
6. Step 6: Final answer
   x = 28,162.35