Finding the Fourth Proportional to 70,578.72, 97,406.37 and 40,366.80

Step by Step Solution

1. Step 1: Write the proportion equation
   70,578.72 : 97,406.37 = 40,366.80 : x
2. Step 2: Convert to fraction form
   70,578.72/97,406.37 = 40,366.80/x
3. Step 3: Cross multiply
   70,578.72x = 97,406.37 × 40,366.80
4. Step 4: Simplify right side
   70,578.72x = 3,931,983,456.52
5. Step 5: Solve for x
   x = 3,931,983,456.52/70,578.72
6. Step 6: Final answer
   x = 55,710.61