Finding the Fourth Proportional to 71,196.64, 98,240.82 and 40,570

Step by Step Solution

1. Step 1: Write the proportion equation
   71,196.64 : 98,240.82 = 40,570 : x
2. Step 2: Convert to fraction form
   71,196.64/98,240.82 = 40,570/x
3. Step 3: Cross multiply
   71,196.64x = 98,240.82 × 40,570
4. Step 4: Simplify right side
   71,196.64x = 3,985,630,067.40
5. Step 5: Solve for x
   x = 3,985,630,067.40/71,196.64
6. Step 6: Final answer
   x = 55,980.59