Finding the Fourth Proportional to 72,563.10, 108,802.74 and 28,137.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,563.10 : 108,802.74 = 28,137.96 : x
2. Step 2: Convert to fraction form
   72,563.10/108,802.74 = 28,137.96/x
3. Step 3: Cross multiply
   72,563.10x = 108,802.74 × 28,137.96
4. Step 4: Simplify right side
   72,563.10x = 3,061,487,146.01
5. Step 5: Solve for x
   x = 3,061,487,146.01/72,563.10
6. Step 6: Final answer
   x = 42,190.69