Finding the Fourth Proportional to 52,851.20, 72,933.84 and 28,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   52,851.20 : 72,933.84 = 28,978.08 : x
2. Step 2: Convert to fraction form
   52,851.20/72,933.84 = 28,978.08/x
3. Step 3: Cross multiply
   52,851.20x = 72,933.84 × 28,978.08
4. Step 4: Simplify right side
   52,851.20x = 2,113,482,650.23
5. Step 5: Solve for x
   x = 2,113,482,650.23/52,851.20
6. Step 6: Final answer
   x = 39,989.30