Finding the Fourth Proportional to 52,858.88, 72,942.72 and 28,981.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52,858.88 : 72,942.72 = 28,981.12 : x
2. Step 2: Convert to fraction form
   52,858.88/72,942.72 = 28,981.12/x
3. Step 3: Cross multiply
   52,858.88x = 72,942.72 × 28,981.12
4. Step 4: Simplify right side
   52,858.88x = 2,113,961,721.45
5. Step 5: Solve for x
   x = 2,113,961,721.45/52,858.88
6. Step 6: Final answer
   x = 39,992.56