Finding the Fourth Proportional to 35,491.72, 53,242.38 and 28,109.88

Step by Step Solution

1. Step 1: Write the proportion equation
   35,491.72 : 53,242.38 = 28,109.88 : x
2. Step 2: Convert to fraction form
   35,491.72/53,242.38 = 28,109.88/x
3. Step 3: Cross multiply
   35,491.72x = 53,242.38 × 28,109.88
4. Step 4: Simplify right side
   35,491.72x = 1,496,636,912.71
5. Step 5: Solve for x
   x = 1,496,636,912.71/35,491.72
6. Step 6: Final answer
   x = 42,168.62