Finding the Fourth Proportional to 72,697.84, 109,002.11 and 28,272.81

Step by Step Solution

1. Step 1: Write the proportion equation
   72,697.84 : 109,002.11 = 28,272.81 : x
2. Step 2: Convert to fraction form
   72,697.84/109,002.11 = 28,272.81/x
3. Step 3: Cross multiply
   72,697.84x = 109,002.11 × 28,272.81
4. Step 4: Simplify right side
   72,697.84x = 3,081,796,213.02
5. Step 5: Solve for x
   x = 3,081,796,213.02/72,697.84
6. Step 6: Final answer
   x = 42,391.86