Finding the Fourth Proportional to 69,434.16, 104,067.72 and 39,870.96

Step by Step Solution

1. Step 1: Write the proportion equation
   69,434.16 : 104,067.72 = 39,870.96 : x
2. Step 2: Convert to fraction form
   69,434.16/104,067.72 = 39,870.96/x
3. Step 3: Cross multiply
   69,434.16x = 104,067.72 × 39,870.96
4. Step 4: Simplify right side
   69,434.16x = 4,149,279,901.41
5. Step 5: Solve for x
   x = 4,149,279,901.41/69,434.16
6. Step 6: Final answer
   x = 59,758.48