Finding the Fourth Proportional to 52,776.21, 72,831.20 and 28,904.39

Step by Step Solution

1. Step 1: Write the proportion equation
   52,776.21 : 72,831.20 = 28,904.39 : x
2. Step 2: Convert to fraction form
   52,776.21/72,831.20 = 28,904.39/x
3. Step 3: Cross multiply
   52,776.21x = 72,831.20 × 28,904.39
4. Step 4: Simplify right side
   52,776.21x = 2,105,140,900.29
5. Step 5: Solve for x
   x = 2,105,140,900.29/52,776.21
6. Step 6: Final answer
   x = 39,888.07