Finding the Fourth Proportional to 6,931.82, 10,385.41 and 3,970.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,931.82 : 10,385.41 = 3,970.15 : x
2. Step 2: Convert to fraction form
   6,931.82/10,385.41 = 3,970.15/x
3. Step 3: Cross multiply
   6,931.82x = 10,385.41 × 3,970.15
4. Step 4: Simplify right side
   6,931.82x = 41,231,635.51
5. Step 5: Solve for x
   x = 41,231,635.51/6,931.82
6. Step 6: Final answer
   x = 5,948.17