Finding the Fourth Proportional to 47,319.75, 65,302.20 and 30,581.91

Step by Step Solution

1. Step 1: Write the proportion equation
   47,319.75 : 65,302.20 = 30,581.91 : x
2. Step 2: Convert to fraction form
   47,319.75/65,302.20 = 30,581.91/x
3. Step 3: Cross multiply
   47,319.75x = 65,302.20 × 30,581.91
4. Step 4: Simplify right side
   47,319.75x = 1,997,066,003.20
5. Step 5: Solve for x
   x = 1,997,066,003.20/47,319.75
6. Step 6: Final answer
   x = 42,203.65