Finding the Fourth Proportional to 52,855.42, 72,940.50 and 28,981.60

Step by Step Solution

1. Step 1: Write the proportion equation
   52,855.42 : 72,940.50 = 28,981.60 : x
2. Step 2: Convert to fraction form
   52,855.42/72,940.50 = 28,981.60/x
3. Step 3: Cross multiply
   52,855.42x = 72,940.50 × 28,981.60
4. Step 4: Simplify right side
   52,855.42x = 2,113,932,394.80
5. Step 5: Solve for x
   x = 2,113,932,394.80/52,855.42
6. Step 6: Final answer
   x = 39,994.62