Finding the Fourth Proportional to 340,141.50, 469,395.54 and 189,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   340,141.50 : 469,395.54 = 189,238.50 : x
2. Step 2: Convert to fraction form
   340,141.50/469,395.54 = 189,238.50/x
3. Step 3: Cross multiply
   340,141.50x = 469,395.54 × 189,238.50
4. Step 4: Simplify right side
   340,141.50x = 88,827,707,896.29
5. Step 5: Solve for x
   x = 88,827,707,896.29/340,141.50
6. Step 6: Final answer
   x = 261,149.28