Finding the Fourth Proportional to 72,618.72, 108,881.46 and 28,198.14

Step by Step Solution

1. Step 1: Write the proportion equation
   72,618.72 : 108,881.46 = 28,198.14 : x
2. Step 2: Convert to fraction form
   72,618.72/108,881.46 = 28,198.14/x
3. Step 3: Cross multiply
   72,618.72x = 108,881.46 × 28,198.14
4. Step 4: Simplify right side
   72,618.72x = 3,070,254,652.48
5. Step 5: Solve for x
   x = 3,070,254,652.48/72,618.72
6. Step 6: Final answer
   x = 42,279.11