Finding the Fourth Proportional to 54,690.88, 81,978.72 and 28,367.68

Step by Step Solution

1. Step 1: Write the proportion equation
   54,690.88 : 81,978.72 = 28,367.68 : x
2. Step 2: Convert to fraction form
   54,690.88/81,978.72 = 28,367.68/x
3. Step 3: Cross multiply
   54,690.88x = 81,978.72 × 28,367.68
4. Step 4: Simplify right side
   54,690.88x = 2,325,546,095.77
5. Step 5: Solve for x
   x = 2,325,546,095.77/54,690.88
6. Step 6: Final answer
   x = 42,521.64