Finding the Fourth Proportional to 70,910.72, 97,857.46 and 39,080.78

Step by Step Solution

1. Step 1: Write the proportion equation
   70,910.72 : 97,857.46 = 39,080.78 : x
2. Step 2: Convert to fraction form
   70,910.72/97,857.46 = 39,080.78/x
3. Step 3: Cross multiply
   70,910.72x = 97,857.46 × 39,080.78
4. Step 4: Simplify right side
   70,910.72x = 3,824,345,865.62
5. Step 5: Solve for x
   x = 3,824,345,865.62/70,910.72
6. Step 6: Final answer
   x = 53,931.84