Finding the Fourth Proportional to 35,517.48, 49,012.48 and 20,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   35,517.48 : 49,012.48 = 20,399.50 : x
2. Step 2: Convert to fraction form
   35,517.48/49,012.48 = 20,399.50/x
3. Step 3: Cross multiply
   35,517.48x = 49,012.48 × 20,399.50
4. Step 4: Simplify right side
   35,517.48x = 999,830,085.76
5. Step 5: Solve for x
   x = 999,830,085.76/35,517.48
6. Step 6: Final answer
   x = 28,150.37