Finding the Fourth Proportional to 52,690.42, 72,712.83 and 28,817.02

Step by Step Solution

1. Step 1: Write the proportion equation
   52,690.42 : 72,712.83 = 28,817.02 : x
2. Step 2: Convert to fraction form
   52,690.42/72,712.83 = 28,817.02/x
3. Step 3: Cross multiply
   52,690.42x = 72,712.83 × 28,817.02
4. Step 4: Simplify right side
   52,690.42x = 2,095,367,076.37
5. Step 5: Solve for x
   x = 2,095,367,076.37/52,690.42
6. Step 6: Final answer
   x = 39,767.52