Finding the Fourth Proportional to 31,613.57, 43,630.92 and 30,575.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,613.57 : 43,630.92 = 30,575.06 : x
2. Step 2: Convert to fraction form
   31,613.57/43,630.92 = 30,575.06/x
3. Step 3: Cross multiply
   31,613.57x = 43,630.92 × 30,575.06
4. Step 4: Simplify right side
   31,613.57x = 1,334,017,996.86
5. Step 5: Solve for x
   x = 1,334,017,996.86/31,613.57
6. Step 6: Final answer
   x = 42,197.64