Finding the Fourth Proportional to 70,986.28, 97,961.34 and 39,154.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,986.28 : 97,961.34 = 39,154.72 : x
2. Step 2: Convert to fraction form
   70,986.28/97,961.34 = 39,154.72/x
3. Step 3: Cross multiply
   70,986.28x = 97,961.34 × 39,154.72
4. Step 4: Simplify right side
   70,986.28x = 3,835,648,838.52
5. Step 5: Solve for x
   x = 3,835,648,838.52/70,986.28
6. Step 6: Final answer
   x = 54,033.66