Finding the Fourth Proportional to 69,870, 96,426.36 and 40,067.76

Step by Step Solution

1. Step 1: Write the proportion equation
   69,870 : 96,426.36 = 40,067.76 : x
2. Step 2: Convert to fraction form
   69,870/96,426.36 = 40,067.76/x
3. Step 3: Cross multiply
   69,870x = 96,426.36 × 40,067.76
4. Step 4: Simplify right side
   69,870x = 3,863,588,250.15
5. Step 5: Solve for x
   x = 3,863,588,250.15/69,870
6. Step 6: Final answer
   x = 55,296.81