Finding the Fourth Proportional to 35,991.72, 53,991.54 and 13,824.12

Step by Step Solution

1. Step 1: Write the proportion equation
   35,991.72 : 53,991.54 = 13,824.12 : x
2. Step 2: Convert to fraction form
   35,991.72/53,991.54 = 13,824.12/x
3. Step 3: Cross multiply
   35,991.72x = 53,991.54 × 13,824.12
4. Step 4: Simplify right side
   35,991.72x = 746,385,527.94
5. Step 5: Solve for x
   x = 746,385,527.94/35,991.72
6. Step 6: Final answer
   x = 20,737.70