Finding the Fourth Proportional to 30,638.30, 42,279.27 and 17,210.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,638.30 : 42,279.27 = 17,210.12 : x
2. Step 2: Convert to fraction form
   30,638.30/42,279.27 = 17,210.12/x
3. Step 3: Cross multiply
   30,638.30x = 42,279.27 × 17,210.12
4. Step 4: Simplify right side
   30,638.30x = 727,631,310.21
5. Step 5: Solve for x
   x = 727,631,310.21/30,638.30
6. Step 6: Final answer
   x = 23,749.08