Finding the Fourth Proportional to 72,710.84, 109,021.60 and 28,285.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,710.84 : 109,021.60 = 28,285.82 : x
2. Step 2: Convert to fraction form
   72,710.84/109,021.60 = 28,285.82/x
3. Step 3: Cross multiply
   72,710.84x = 109,021.60 × 28,285.82
4. Step 4: Simplify right side
   72,710.84x = 3,083,765,353.71
5. Step 5: Solve for x
   x = 3,083,765,353.71/72,710.84
6. Step 6: Final answer
   x = 42,411.36