Finding the Fourth Proportional to 52,743.72, 72,786.28 and 28,870.18

Step by Step Solution

1. Step 1: Write the proportion equation
   52,743.72 : 72,786.28 = 28,870.18 : x
2. Step 2: Convert to fraction form
   52,743.72/72,786.28 = 28,870.18/x
3. Step 3: Cross multiply
   52,743.72x = 72,786.28 × 28,870.18
4. Step 4: Simplify right side
   52,743.72x = 2,101,353,005.13
5. Step 5: Solve for x
   x = 2,101,353,005.13/52,743.72
6. Step 6: Final answer
   x = 39,840.82