Finding the Fourth Proportional to 238,021.50, 328,469.94 and 137,419.50

Step by Step Solution

1. Step 1: Write the proportion equation
   238,021.50 : 328,469.94 = 137,419.50 : x
2. Step 2: Convert to fraction form
   238,021.50/328,469.94 = 137,419.50/x
3. Step 3: Cross multiply
   238,021.50x = 328,469.94 × 137,419.50
4. Step 4: Simplify right side
   238,021.50x = 45,138,174,919.83
5. Step 5: Solve for x
   x = 45,138,174,919.83/238,021.50
6. Step 6: Final answer
   x = 189,639.07