Finding the Fourth Proportional to 257,869.77, 355,870.59 and 141,587.89

Step by Step Solution

1. Step 1: Write the proportion equation
   257,869.77 : 355,870.59 = 141,587.89 : x
2. Step 2: Convert to fraction form
   257,869.77/355,870.59 = 141,587.89/x
3. Step 3: Cross multiply
   257,869.77x = 355,870.59 × 141,587.89
4. Step 4: Simplify right side
   257,869.77x = 50,386,965,061.48
5. Step 5: Solve for x
   x = 50,386,965,061.48/257,869.77
6. Step 6: Final answer
   x = 195,396.94