Finding the Fourth Proportional to 30,558.50, 42,170.79 and 17,310.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,558.50 : 42,170.79 = 17,310.50 : x
2. Step 2: Convert to fraction form
   30,558.50/42,170.79 = 17,310.50/x
3. Step 3: Cross multiply
   30,558.50x = 42,170.79 × 17,310.50
4. Step 4: Simplify right side
   30,558.50x = 729,997,460.30
5. Step 5: Solve for x
   x = 729,997,460.30/30,558.50
6. Step 6: Final answer
   x = 23,888.52