Finding the Fourth Proportional to 72,581.99, 108,830.60 and 28,156.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,581.99 : 108,830.60 = 28,156.83 : x
2. Step 2: Convert to fraction form
   72,581.99/108,830.60 = 28,156.83/x
3. Step 3: Cross multiply
   72,581.99x = 108,830.60 × 28,156.83
4. Step 4: Simplify right side
   72,581.99x = 3,064,324,018.06
5. Step 5: Solve for x
   x = 3,064,324,018.06/72,581.99
6. Step 6: Final answer
   x = 42,218.80