Finding the Fourth Proportional to 52,793.46, 72,855 and 28,920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   52,793.46 : 72,855 = 28,920.18 : x
2. Step 2: Convert to fraction form
   52,793.46/72,855 = 28,920.18/x
3. Step 3: Cross multiply
   52,793.46x = 72,855 × 28,920.18
4. Step 4: Simplify right side
   52,793.46x = 2,106,979,713.90
5. Step 5: Solve for x
   x = 2,106,979,713.90/52,793.46
6. Step 6: Final answer
   x = 39,909.86