Finding the Fourth Proportional to 30,820.79, 42,532.61 and 16,673.65

Step by Step Solution

1. Step 1: Write the proportion equation
   30,820.79 : 42,532.61 = 16,673.65 : x
2. Step 2: Convert to fraction form
   30,820.79/42,532.61 = 16,673.65/x
3. Step 3: Cross multiply
   30,820.79x = 42,532.61 × 16,673.65
4. Step 4: Simplify right side
   30,820.79x = 709,173,663.03
5. Step 5: Solve for x
   x = 709,173,663.03/30,820.79
6. Step 6: Final answer
   x = 23,009.59