Finding the Fourth Proportional to 70,086.29, 96,715.71 and 39,868.78

Step by Step Solution

1. Step 1: Write the proportion equation
   70,086.29 : 96,715.71 = 39,868.78 : x
2. Step 2: Convert to fraction form
   70,086.29/96,715.71 = 39,868.78/x
3. Step 3: Cross multiply
   70,086.29x = 96,715.71 × 39,868.78
4. Step 4: Simplify right side
   70,086.29x = 3,855,937,023.07
5. Step 5: Solve for x
   x = 3,855,937,023.07/70,086.29
6. Step 6: Final answer
   x = 55,017.00