Finding the Fourth Proportional to 72,693.34, 109,018.94 and 28,310.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,693.34 : 109,018.94 = 28,310.20 : x
2. Step 2: Convert to fraction form
   72,693.34/109,018.94 = 28,310.20/x
3. Step 3: Cross multiply
   72,693.34x = 109,018.94 × 28,310.20
4. Step 4: Simplify right side
   72,693.34x = 3,086,347,995.19
5. Step 5: Solve for x
   x = 3,086,347,995.19/72,693.34
6. Step 6: Final answer
   x = 42,457.09