Finding the Fourth Proportional to 340,490.82, 510,440.31 and 171,870.69

Step by Step Solution

1. Step 1: Write the proportion equation
   340,490.82 : 510,440.31 = 171,870.69 : x
2. Step 2: Convert to fraction form
   340,490.82/510,440.31 = 171,870.69/x
3. Step 3: Cross multiply
   340,490.82x = 510,440.31 × 171,870.69
4. Step 4: Simplify right side
   340,490.82x = 87,729,728,283.51
5. Step 5: Solve for x
   x = 87,729,728,283.51/340,490.82
6. Step 6: Final answer
   x = 257,656.66