Finding the Fourth Proportional to 72,805.59, 109,224.77 and 28,445

Step by Step Solution

1. Step 1: Write the proportion equation
   72,805.59 : 109,224.77 = 28,445 : x
2. Step 2: Convert to fraction form
   72,805.59/109,224.77 = 28,445/x
3. Step 3: Cross multiply
   72,805.59x = 109,224.77 × 28,445
4. Step 4: Simplify right side
   72,805.59x = 3,106,898,582.65
5. Step 5: Solve for x
   x = 3,106,898,582.65/72,805.59
6. Step 6: Final answer
   x = 42,673.90