Finding the Fourth Proportional to 72,588.70, 108,831.57 and 28,178.02

Step by Step Solution

1. Step 1: Write the proportion equation
   72,588.70 : 108,831.57 = 28,178.02 : x
2. Step 2: Convert to fraction form
   72,588.70/108,831.57 = 28,178.02/x
3. Step 3: Cross multiply
   72,588.70x = 108,831.57 × 28,178.02
4. Step 4: Simplify right side
   72,588.70x = 3,066,658,156.09
5. Step 5: Solve for x
   x = 3,066,658,156.09/72,588.70
6. Step 6: Final answer
   x = 42,247.05